{"title":"Blue Sea Systems","description":"\u003cp\u003eBrowse 20 Blue Sea Systems products at British Garage, including lighting \u0026amp; electrical parts and batteries \u0026amp; battery accessories. Every listing names the vehicles and fitments it suits — check the compatibility details on each product page before you order.\u003c\/p\u003e\u003cp\u003eFree tracked UK delivery on every order and 30-day returns.\u003c\/p\u003e","products":[{"product_id":"blue-sea-systems-250a-battery-terminal-fuse-beige-10-000-aic-ip66-ignition-protected","title":"Blue Sea Systems 250A Battery Terminal Fuse, Beige — 10,000 AIC, IP66 Ignition-Protected","description":"\u003cp\u003e\u003cstrong\u003eThe Blue Sea Systems 5189 is a 250-amp battery terminal fuse engineered to protect large DC battery banks with a 10,000 AIC rating and visible blown indication.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for marine and mobile DC power systems, this beige 250A terminal fuse provides high interrupt capacity and clear fault indication while meeting ABYC recommendations for main DC circuit protection. It is intended to be used with Blue Sea terminal fuse blocks (PN 5191 or PN 2151) rather than mounted directly to a battery post, and its ignition-protected, IP66-rated housing makes it appropriate for gasoline-powered boats and other demanding environments.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this fuse protect a large battery bank?\u003c\/h3\u003e\n\u003cp\u003eThe 5189 delivers rapid overcurrent interruption with a 10,000 amp interrupting capacity at 14V DC, which helps isolate faults without allowing destructive fault currents to flow through the system. Its 250-amp rating makes it suitable as a DC main protection device for multi-battery installs when paired with the recommended fuse block.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10,000 AIC at 14V DC—meets ABYC guidance for DC main protection on large banks\u003c\/li\u003e\n  \u003cli\u003e250A nominal rating for high-current service\u003c\/li\u003e\n  \u003cli\u003eUse only with PN 5191 or PN 2151 fuse blocks—prevents unsafe terminal mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat features help identify and respond to a blown fuse?\u003c\/h3\u003e\n\u003cp\u003eThe 5189 includes a visible blown condition indicator so you can quickly confirm a fault without disassembly. That immediate visual feedback reduces diagnostic time and supports safer, faster restoration of power when replacing the fuse in the proper fuse block.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVisible blown indication—fast visual fault confirmation\u003c\/li\u003e\n  \u003cli\u003ePack of one fuse—keeps spare counts clear for planning\u003c\/li\u003e\n  \u003cli\u003eClear housing color contrast (beige) to spot status at a glance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this fuse suitable for marine and gasoline-powered installations?\u003c\/h3\u003e\n\u003cp\u003eYes. The 5189 is ignition protected so it can be installed aboard gasoline-powered boats where ignition protection is required. It also carries an IP66 designation, offering robust protection against powerful water jets—helpful in wet or spray-prone marine environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIgnition protected—meets safety needs for gasoline-engine compartments\u003c\/li\u003e\n  \u003cli\u003eIP66 rated—resists strong water jets and spray exposure\u003c\/li\u003e\n  \u003cli\u003e58V DC maximum voltage rating—covers typical DC marine electrical ranges\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should this fuse be installed and maintained?\u003c\/h3\u003e\n\u003cp\u003eInstall the 5189 only within an approved Blue Sea terminal fuse block (PN 5191 or PN 2151); never mount the fuse directly on the battery terminal. Periodically inspect the fuse and fuse block for corrosion, secure connections, and clear blown indicators to keep the DC system reliable.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse PN 5191 or PN 2151 terminal fuse blocks—required for safe mounting\u003c\/li\u003e\n  \u003cli\u003eDo not mount directly to the battery terminal—prevents unsafe stress and poor contact\u003c\/li\u003e\n  \u003cli\u003eRoutine visual checks for blown indication, tight hardware, and cleanliness\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Blue Sea Systems 5189 250A Terminal Fuse is intended for boat owners, installers, and electricians working on high-capacity DC systems who need a robust main fuse with high interrupt capacity and clear blown indication. It’s particularly suited for marine environments and gasoline-engine compartments where ignition protection and water resistance are important. Choose this fuse when you require ABYC-aligned main protection on large battery banks and will install it in the specified Blue Sea fuse blocks for safe, code-aligned operation.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I attach the 5189 directly to a battery terminal?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The 5189 must be used with Blue Sea terminal fuse blocks PN 5191 or PN 2151; direct battery mounting is not permitted.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What interrupt capacity and voltage does this fuse support?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It provides 10,000 AIC at 14V DC and is rated to a maximum of 58V DC for typical DC systems.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55162651967831,"sku":"B0026KY6R0","price":27.29,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-5189-front-view.jpg?v=1790337754"},{"product_id":"blue-sea-systems-mrbf-terminal-fuse-125a-marine-dc-main-protection-10-000-aic-compact-design","title":"Blue Sea Systems MRBF Terminal Fuse 125A — Marine DC main protection, 10,000 AIC compact design","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems MRBF Terminal Fuse, 125A, is a high-interrupt-capacity terminal fuse designed to protect large DC battery banks when installed in the correct terminal fuse blocks.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact marine-grade fuse provides reliable overcurrent protection for main DC circuits on boats and large battery systems. Engineered for high fault-clearing performance, the MRBF 125A meets rigorous electrical interruption standards and must be mounted in the compatible Blue Sea terminal fuse blocks (PN 5191 or PN 2151). The unit’s small footprint and robust rating make it a suitable option for hobbyist and professional marine electrical setups where safe, efficient circuit protection is required.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the MRBF 125A protect my boat’s electrical system?\u003c\/h3\u003e\n\u003cp\u003eThe MRBF 125A interrupts high short-circuit currents quickly to prevent wiring and equipment damage. With a high AIC rating, it handles severe fault currents that can occur on large battery banks, reducing the risk of sustained arcing and component failure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e125 amps nominal fuse rating for main DC circuits\u003c\/li\u003e\n  \u003cli\u003e10,000 AIC at 14V DC for robust short-circuit interruption\u003c\/li\u003e\n  \u003cli\u003eDesigned to be used in purpose-built terminal fuse blocks only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere should I install this terminal fuse and what do I need?\u003c\/h3\u003e\n\u003cp\u003eNever mount the MRBF directly to a battery terminal; it requires a compatible terminal fuse block to ensure proper mechanical and electrical connection. Blue Sea Systems recommends using PN 5191 or PN 2151 fuse blocks for safe installation and optimized performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse only PN 5191 or PN 2151 terminal fuse blocks\u003c\/li\u003e\n  \u003cli\u003eFollow torque and wiring guidelines in block and boat documentation\u003c\/li\u003e\n  \u003cli\u003eKeep fuse accessible for inspection and replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key electrical and physical specifications?\u003c\/h3\u003e\n\u003cp\u003eThe MRBF 125A combines a high interrupting capacity with a compact package size for easy integration into existing panels. Its physical dimensions make it straightforward to fit inside terminal blocks and enclosed compartments where space is limited.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRated current: 125 A\u003c\/li\u003e\n  \u003cli\u003eInterrupting rating: 10,000 AIC at 14V DC\u003c\/li\u003e\n  \u003cli\u003ePackage dimensions: approximately 3.555 cm L × 8.128 cm W × 0.508 cm H\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this fuse meet safety and regulatory expectations?\u003c\/h3\u003e\n\u003cp\u003eThe MRBF’s high AIC value helps satisfy typical marine electrical protection standards for main DC circuits on large battery banks, supporting compliance with industry guidance when installed properly. Using the recommended terminal fuse block ensures the fuse performs as intended under fault conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10,000 AIC supports ABYC-style interruption expectations for DC mains\u003c\/li\u003e\n  \u003cli\u003eInstall in approved fuse blocks to meet recommended installation practices\u003c\/li\u003e\n  \u003cli\u003eRegular inspection helps maintain safe operation over time\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Blue Sea Systems MRBF Terminal Fuse, 125A, is aimed at boat owners, marine electricians, and anyone managing larger 12–14V battery banks who need a compact, high-interrupt-capacity terminal fuse. It is especially useful where space is limited but high fault-clearing ability is required—provided the installer uses the correct Blue Sea terminal fuse block and follows marine electrical best practices.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mount the MRBF fuse directly to a battery terminal?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The MRBF must be installed in a compatible terminal fuse block (PN 5191 or PN 2151), not mounted directly to the battery terminal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What fault current can this 125A fuse interrupt?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: This MRBF 125A fuse is rated for 10,000 AIC at 14V DC, suitable for high fault-clearing on large battery banks.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55163757658455,"sku":"B0017SHWKA","price":34.32,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-mrbf-terminal-fuse-front-view.jpg?v=1790347103"},{"product_id":"blue-sea-systems-mrbf-terminal-fuse-100a-10-000-aic-marine-battery-main-protection-compact-form","title":"Blue Sea Systems MRBF Terminal Fuse 100A — 10,000 AIC marine battery main protection, compact form","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems MRBF Terminal Fuse 100A is a compact, high-interrupt-capacity battery terminal fuse designed to protect large DC battery banks on boats and mobile power systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis 100-amp MRBF (Marine Rated Blade Fuse) from Blue Sea Systems is engineered to meet demanding marine electrical standards while taking up minimal space at the battery terminal. With a 10,000 AIC rating at 14 V DC, it provides robust interrupt capability suitable for main circuit protection when used with the required terminal fuse block. The MRBF form factor simplifies installation for tight battery compartments, but it must be mounted only on compatible terminal fuse blocks (PN 5191 or PN 2151) rather than directly on a battery post.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this fuse protect a boat's DC main circuit?\u003c\/h3\u003e\n\u003cp\u003eThe MRBF 100A interrupts excessive current safely to limit wiring and equipment damage in high-fault situations. Its 10,000-amp interrupting capacity at 14 V DC meets ABYC-style requirements for protecting large battery banks when installed in the correct block. Using a terminal fuse block positions the fuse for proper electrical and mechanical support.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e100-amp continuous rating for main battery line protection\u003c\/li\u003e\n  \u003cli\u003e10,000 AIC at 14 V DC for high-energy fault interruption\u003c\/li\u003e\n  \u003cli\u003eCompatible only with terminal fuse blocks PN 5191 or PN 2151\u003c\/li\u003e\n  \u003cli\u003eMRBF form designed for compact battery compartment mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat do I need to install this MRBF successfully?\u003c\/h3\u003e\n\u003cp\u003eInstallation requires a compatible terminal fuse block—do not mount the MRBF directly to the battery terminal. Proper torque on block hardware and correct wire sizing for a 100A circuit keep the assembly safe and reliable. Follow Blue Sea Systems’ mounting instructions and ABYC guidance for DC main protection layouts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTerminal fuse block PN 5191 or PN 2151 is mandatory\u003c\/li\u003e\n  \u003cli\u003eUse appropriately sized conductor for 100A continuous load\u003c\/li\u003e\n  \u003cli\u003eSecure block to a non-conductive surface with recommended torque\u003c\/li\u003e\n  \u003cli\u003eVerify clearances inside the battery compartment for the MRBF profile\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat physical and performance features should I expect?\u003c\/h3\u003e\n\u003cp\u003eThe MRBF 100A is small in footprint but built for heavy-duty interruption capability. Package dimensions are compact, enabling installation in confined spaces; performance values reflect marine electrical safety expectations. It’s optimized for battery main circuits rather than branch-level protection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompact package roughly 2.108 cm L × 3.911 cm W × 8.001 cm H\u003c\/li\u003e\n  \u003cli\u003eDesigned specifically for battery-terminal main protection roles\u003c\/li\u003e\n  \u003cli\u003eHigh interrupting capacity for effective fault clearing\u003c\/li\u003e\n  \u003cli\u003eRequires use with Blue Sea Systems terminal fuse blocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for?\u003c\/p\u003e\n\u003cp\u003eThe Blue Sea Systems MRBF 100A terminal fuse is aimed at boat owners, marine electricians, and mobile power installers who need dependable main battery protection with a small footprint. It suits systems that demand a 100-amp main protective device with high interrupt capability and where mounting space is limited—provided the installer uses the required terminal fuse block and follows recommended wiring practices.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mount the MRBF fuse directly on the battery post?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The MRBF must be used with terminal fuse block PN 5191 or PN 2151 and not mounted directly to the battery terminal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What interrupting capacity does the 100A MRBF provide?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The fuse is rated 10,000 AIC at 14 V DC, suitable for main circuit protection on large battery banks.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55163886338391,"sku":"B0017SJOH4","price":35.06,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-mrbf-100a-front-view.jpg?v=1790347948"},{"product_id":"blue-sea-systems-mrbf-150a-terminal-fuse-150a-main-battery-protection-10-000-aic-dc","title":"Blue Sea Systems MRBF 150A Terminal Fuse — 150A Main Battery Protection, 10,000 AIC (DC)","description":"\u003cp\u003e\u003cstrong\u003eThe Blue Sea Systems MRBF Terminal Fuse 150A is a compact, high-interrupt-capacity battery terminal fuse designed to protect large DC battery banks where a 150-amp main fuse is required.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe MRBF Terminal Fuse (150A) from Blue Sea Systems is built for marine and mobile DC power systems where reliable main-circuit protection and ABYC-compliant interrupting capacity matter. This terminal-mounted fuse is intended for use with compatible terminal fuse blocks and provides a high 10,000 AIC at 14 V DC rating to handle severe fault currents without damage. It’s sized for heavy battery banks but must be installed on a compatible fuse block rather than directly onto a battery post.\u003c\/p\u003e\n\n\u003ch3\u003eWhat distinguishes this 150A MRBF terminal fuse from ordinary fuses?\u003c\/h3\u003e\n\u003cp\u003eThis MRBF model offers a much higher interrupting rating than common blade or cartridge fuses, making it suitable for large-capacity battery installations. Its construction is optimized for DC systems and meets requirements for main circuit protection under marine electrical guidelines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e150-amp continuous rating for main battery protection\u003c\/li\u003e\n  \u003cli\u003e10,000 AIC (at 14 V DC) to safely clear high fault currents\u003c\/li\u003e\n  \u003cli\u003eRobust terminal-style form factor for secure connections\u003c\/li\u003e\n  \u003cli\u003eDesigned specifically for use with Blue Sea terminal fuse blocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should the MRBF 150A fuse be installed and what accessories are required?\u003c\/h3\u003e\n\u003cp\u003eDo not install the MRBF fuse directly on a battery post. It requires one of Blue Sea’s approved terminal fuse blocks to provide secure mounting and proper electrical clearance. Follow manufacturer wiring practices and torque specs when connecting conductors.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMust be mounted in a compatible terminal fuse block (PN 5191 or PN 2151)\u003c\/li\u003e\n  \u003cli\u003eUse appropriate ring terminals, copper lugs, and correct torque values\u003c\/li\u003e\n  \u003cli\u003eLocate in an accessible, ventilated area away from direct heat sources\u003c\/li\u003e\n  \u003cli\u003eConfirm wire and busbar ampacity matches the 150A rating\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat electrical performance and safety features should I expect?\u003c\/h3\u003e\n\u003cp\u003eThe MRBF 150A provides high interrupting capacity for DC mains, reducing the risk of catastrophic failures on large battery banks. It satisfies industry recommendations for main circuit protection on vessels and other large DC systems where substantial short-circuit currents can occur.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10,000 AIC rating at 14 V DC to meet ABYC-recommended protection\u003c\/li\u003e\n  \u003cli\u003eReliable operation under heavy-duty marine and industrial conditions\u003c\/li\u003e\n  \u003cli\u003eCompact dimensions simplify routing and space-limited installations (7.62 x 3.556 x 2.54 cm)\u003c\/li\u003e\n  \u003cli\u003eDesigned for a terminal-fuse block mounting to ensure safe installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich environments and systems are best suited to this fuse?\u003c\/h3\u003e\n\u003cp\u003eThe MRBF 150A is engineered for boats, RVs, and large stationary or mobile battery banks where a main DC fuse is required. It’s ideal when high interrupting capacity and a secure terminal connection are priorities.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLarge marine battery banks and DC main circuits\u003c\/li\u003e\n  \u003cli\u003eCommercial and recreational vehicles with substantial electrical loads\u003c\/li\u003e\n  \u003cli\u003eIndustrial battery systems where space is limited but fault capacity is critical\u003c\/li\u003e\n  \u003cli\u003eInstallations that use Blue Sea terminal fuse blocks for safe mounting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Installers, boatowners, fleet managers, and electricians specifying main battery protection for heavy-duty DC systems will value the Blue Sea Systems MRBF 150A fuse. Choose this part when you need a compact, high-AIC solution that integrates with Blue Sea terminal fuse blocks to meet ABYC-style protection expectations while keeping installation tidy and serviceable.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mount the MRBF 150A directly to the battery terminal?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The MRBF 150A must be installed in a compatible terminal fuse block (PN 5191 or PN 2151), not directly on the battery post.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the interrupting capacity of this 150A MRBF fuse?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It provides 10,000 AIC at 14 V DC, suitable for main circuit protection on large battery banks.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55163888402775,"sku":"B001AFVW4C","price":33.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-mrbf-terminal-fuse-front.jpg?v=1790347968"},{"product_id":"blue-sea-systems-300a-battery-terminal-fuse-5190-silver-plated-terminal-with-replaceable-cartridge","title":"Blue Sea Systems 300A Battery Terminal Fuse 5190, Silver-Plated Terminal with Replaceable Cartridge","description":"\u003cp\u003e\u003cstrong\u003eThe Blue Sea Systems 5190 is a 300-amp silver battery terminal fuse and terminal block designed to protect high-current battery connections while providing a clean, low-resistance mounting point.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact terminal fuse from Blue Sea Systems combines a heavy-duty 300A fusible link with a rugged silver-plated terminal block for marine, automotive, and off-grid battery systems. Built to fit standard battery post installations, the 5190 simplifies wiring by merging a protected connection and a serviceable fuse into a single, corrosion-resistant assembly. Its small footprint and straightforward wiring layout make it useful where space is limited but high-current protection is required.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the 5190 protect my battery system?\u003c\/h3\u003e\n\u003cp\u003eThe 5190 uses a replaceable 300-amp fuse element integrated into a terminal block, interrupting dangerous overcurrent before wiring or equipment is damaged. The fuse is positioned directly at the battery terminal to reduce unprotected cable length and quickly isolate faults.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e300-amp fusible element rated for high-current protection\u003c\/li\u003e\n  \u003cli\u003eDirect battery post mounting minimizes unprotected conductor runs\u003c\/li\u003e\n  \u003cli\u003eSilver-plated surfaces for low resistance and improved conductivity\u003c\/li\u003e\n  \u003cli\u003eReplaceable fuse cartridge for simple maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the physical features and installation details?\u003c\/h3\u003e\n\u003cp\u003eThe unit is a compact terminal block engineered to fit on a battery post and accept large gauge cable lugs. It ships as a single-item package with a small footprint and lightweight construction, making it straightforward to install with standard hand tools.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eItem dimensions approximately 4.015 x 4.015 x 3.26 inches\u003c\/li\u003e\n  \u003cli\u003ePackage weight about 0.13 pounds; single quantity in box\u003c\/li\u003e\n  \u003cli\u003eSilver finish for corrosion resistance and tight electrical contact\u003c\/li\u003e\n  \u003cli\u003eDesigned to accept heavy-gauge lugs and secure mounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich applications is the 5190 best suited for?\u003c\/h3\u003e\n\u003cp\u003eThis terminal fuse is intended for systems that demand a high-current, protected battery connection such as boats, RVs, automotive starting circuits, and small off-grid power installations. It is not a replacement for circuit-level protection in every circuit, but it provides a reliable main battery protection point.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMarine and boating battery banks where space and corrosion resistance matter\u003c\/li\u003e\n  \u003cli\u003eAutomotive and heavy equipment starter battery protection\u003c\/li\u003e\n  \u003cli\u003eSmall off-grid battery arrays and backup power systems\u003c\/li\u003e\n  \u003cli\u003eSituations requiring a single, serviceable high-current disconnect\/fuse\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Blue Sea Systems 5190 is for DIYers, mechanics, marine electricians, and system builders who need a compact, serviceable 300A protection point at the battery terminal. If you require low-resistance connections, easy fuse service, and a small footprint for high-current circuits, this terminal fuse offers a practical and corrosion-resistant solution.\u003c\/p\u003e\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What amperage does the Blue Sea 5190 support?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The 5190 uses a 300-amp fuse element for main battery protection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mount the 5190 directly to a battery post?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it is designed for direct battery terminal mounting and heavy-gauge cable lugs.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55163888435543,"sku":"B001AFZL9O","price":31.74,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-5190-front-view.jpg?v=1790347968"},{"product_id":"blue-sea-systems-battery-terminal-fuse-40a-ignition-protected-clear-inspection-window","title":"Blue Sea Systems Battery Terminal Fuse 40A — Ignition-Protected, Clear Inspection Window","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems 5176 is a 40A, ignition-protected battery terminal fuse designed to provide high-interrupt protection for large DC battery banks when used with the appropriate terminal fuse block.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact terminal fuse replaces a direct battery terminal connection and delivers a visible, serviceable overcurrent safeguard for marine and mobile electrical systems. Engineered to meet ABYC interrupt requirements, the 5176 combines a high fault-clearing capacity with a clear inspection window and ignition protection, making it suitable for gasoline-powered boats and other transport applications when installed on an approved fuse block.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the 5176 protect my boat's DC main circuits?\u003c\/h3\u003e\n\u003cp\u003eThe 5176 provides a 40 amp-rated point of overcurrent protection with a very high interrupt capability, so large battery banks are protected against sudden short circuits. Its construction allows the fuse to clear heavy faults safely while satisfying recognized marine industry standards.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRated amperage: 40A for continuous circuit protection\u003c\/li\u003e\n  \u003cli\u003eInterrupt rating: 10,000 AIC at 14V DC to handle high fault currents\u003c\/li\u003e\n  \u003cli\u003eMeets ABYC requirements for DC main circuit protection on larger banks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I install the 5176 directly to a battery terminal?\u003c\/h3\u003e\n\u003cp\u003eNo — the 5176 is intended for use only with specified terminal fuse blocks. Mounting the fuse directly to a battery post is not recommended or supported. Using the correct block ensures proper clamping, insulation, and mechanical security.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequired blocks: Terminal Fuse Blocks PN 5191 or PN 2151\u003c\/li\u003e\n  \u003cli\u003ePrevents loose connections and maintains ignition protection when correctly installed\u003c\/li\u003e\n  \u003cli\u003eImproves access for inspection and replacement through proper block placement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat features help me inspect and maintain the fuse?\u003c\/h3\u003e\n\u003cp\u003eThe 5176 includes a clear inspection window so you can quickly confirm whether the element has opened, without removing the assembly. Its ignition-protected design and compact footprint make visual checks and swaps straightforward during routine maintenance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClear window: instant visual indication of blown condition\u003c\/li\u003e\n  \u003cli\u003eIgnition protected: safe for use aboard gasoline-powered craft when installed per instructions\u003c\/li\u003e\n  \u003cli\u003eCompact dimensions: 8.128 cm L x 3.81 cm W x 2.032 cm H for minimal space usage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the electrical limits and safety considerations?\u003c\/h3\u003e\n\u003cp\u003eThe fuse is designed to interrupt large DC fault currents while carrying its 40A rating under normal operation. Installers should follow manufacturer guidance and ABYC recommendations, including correct block selection and secure mounting, to maintain system safety.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eContinuous rating: 40 amps\u003c\/li\u003e\n  \u003cli\u003eFault clearing: 10,000 AIC at 14V DC meets ABYC limits for main circuits\u003c\/li\u003e\n  \u003cli\u003eUse only with compatible terminal fuse blocks and proper battery wiring practices\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Blue Sea Systems 5176 40A terminal fuse is aimed at boat owners, marine electricians, and mobile power installers who require a high-interrupt, visible fuse solution for large DC battery banks. If you need a compact, ignition-protected fuse that satisfies ABYC interrupt requirements and works with Blue Sea terminal fuse blocks PN 5191 or PN 2151, this part is a practical choice. It’s ideal when space is limited but a reliable, serviceable main-circuit protection device is essential for safe battery system operation.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the 5176 fuse ignition protected?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. When installed on an approved terminal fuse block, the 5176 is ignition protected for use aboard gasoline-powered boats.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What fuse block do I need for the 5176?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use Blue Sea Terminal Fuse Blocks PN 5191 or PN 2151; do not mount the fuse directly to the battery terminal.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55164540748119,"sku":"B0016HTXAY","price":31.74,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-5176-front-view.jpg?v=1790353452"},{"product_id":"blue-sea-systems-mrbf-terminal-fuse-80a-blue-ignition-protected-10-000-aic","title":"Blue Sea Systems MRBF Terminal Fuse 80A Blue — Ignition-Protected, 10,000 AIC","description":"\u003cp\u003e\u003cstrong\u003eThe Blue Sea Systems MRBF 80A terminal fuse is a high-interrupt-capacity, ignition-protected marine fuse that provides visible blown indication and is color-coded for rapid amperage identification.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for demanding DC power installations aboard boats and other vehicles, this MRBF (Molded Blade Replacement Fuse) delivers a 10,000 AIC (Ampere Interruption Capacity) at 14V DC, meeting ABYC expectations for main DC circuit protection on large battery banks. The fuse is intended for use with Blue Sea terminal fuse blocks PN 5191 or PN 2151 and must not be mounted directly to a battery terminal. Its clear inspection window and ignition-protected construction make it practical for confined engine compartments where safety and quick troubleshooting matter.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this fuse handle high-fault conditions?\u003c\/h3\u003e\n\u003cp\u003eThe MRBF 80A is rated for 10,000 AIC at 14V DC, which means it can safely interrupt very large fault currents typical in main DC distribution systems. This high interrupt rating reduces the risk of catastrophic failure and helps the installation meet industry safety standards.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10,000 AIC interruption capability at 14V DC\u003c\/li\u003e\n  \u003cli\u003eMeets ABYC expectations for DC main circuit protection\u003c\/li\u003e\n  \u003cli\u003eSuitable for large battery bank systems and heavy loads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation considerations should I know?\u003c\/h3\u003e\n\u003cp\u003eThis fuse must be paired with an approved terminal fuse block (Blue Sea PN 5191 or PN 2151). Do not attach the MRBF directly to battery posts; using an appropriate block ensures a secure, serviceable connection and correct electrical clearances.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequires terminal fuse block PN 5191 or PN 2151\u003c\/li\u003e\n  \u003cli\u003eDo not mount directly on battery terminals\u003c\/li\u003e\n  \u003cli\u003eInstall in accessible location for replacement and inspection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this fuse safe for gasoline-powered boats and engine spaces?\u003c\/h3\u003e\n\u003cp\u003eYes — the MRBF 80A is ignition protected, allowing installation in gasoline engine compartments where standards require spark suppression and reduced ignition risk. The unit’s sealed construction and clear inspection window support safe, code-conscious installations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIgnition-protected design for engine compartments\u003c\/li\u003e\n  \u003cli\u003eSealed body with visual blown-fuse window\u003c\/li\u003e\n  \u003cli\u003eColor-coded housing for fast amperage recognition\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow can I tell when the fuse has blown?\u003c\/h3\u003e\n\u003cp\u003eBlue Sea designed the MRBF with a transparent inspection window so you can visually confirm a blown element without removing the fuse. This visible indication speeds troubleshooting and reduces downtime compared with sealed, non-indicating fuses.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClear window shows blown element instantly\u003c\/li\u003e\n  \u003cli\u003eSimplifies diagnostics during engine-room checks\u003c\/li\u003e\n  \u003cli\u003eColor coding helps verify amperage at a glance during routine inspection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Blue Sea Systems MRBF 80A is aimed at marine electricians, boat owners, and professional installers working on large DC distribution systems who need a high-interrupt-capacity, ignition-protected fuse with easy visual fault detection. It’s ideal for main DC circuit protection on yachts, commercial vessels, and any installation where ABYC-level protection, safe engine-compartment installation, and fast diagnostics are priorities.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install the MRBF 80A directly on the battery terminal?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The MRBF 80A must be installed in a compatible terminal fuse block (PN 5191 or PN 2151) and not mounted directly to the battery terminal.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the MRBF 80A safe for gasoline engine compartments?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The fuse is ignition protected, making it suitable for installation in gasoline engine spaces when installed per guidelines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55164540879191,"sku":"B001JBOVL8","price":33.93,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-mrbf-80a-front-view.jpg?v=1790353453"},{"product_id":"blue-sea-systems-mrbf-60a-terminal-fuse-60-amp-dc-main-protection-10-000-aic-visible-indicator","title":"Blue Sea Systems MRBF 60A Terminal Fuse — 60 Amp DC Main Protection, 10,000 AIC, Visible Indicator","description":"\u003cp\u003e\u003cstrong\u003eThe Blue Sea Systems MRBF 60A terminal fuse is a high-interrupt-capacity DC main fuse engineered to protect large battery banks with a visible blown indicator.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact 60-amp MRBF terminal fuse delivers robust short-circuit interruption and clear visual status so you can meet ABYC-style DC main protection expectations for larger marine battery systems. Designed for use with Blue Sea terminal fuse blocks, it provides a reliable sacrificial link between the battery bank and downstream distribution while making fault detection simple at a glance.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this fuse protect a marine DC main circuit?\u003c\/h3\u003e\n\u003cp\u003eThe MRBF 60A is rated for 10,000 AIC at 14 V DC, which means it interrupts large fault currents quickly to limit damage to wiring and equipment. It’s intended as the primary or main battery protection when installed in an approved terminal fuse block rather than directly on the battery post.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10,000 AIC interrupting capacity at 14 V DC for high-energy faults\u003c\/li\u003e\n  \u003cli\u003e60-amp continuous rating matched to typical distribution loads\u003c\/li\u003e\n  \u003cli\u003eVisible blown indicator for fast fault identification\u003c\/li\u003e\n  \u003cli\u003eRequires PN 5191 or PN 2151 terminal fuse block for proper installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy must I use a terminal fuse block instead of mounting the fuse on the battery terminal?\u003c\/h3\u003e\n\u003cp\u003eThis fuse is designed to be seated in specific terminal fuse blocks to ensure correct electrical clearance, mechanical support, and safe handling during replacement. Mounting directly to a battery terminal can create unsafe conditions and will not meet the intended installation clearances or ABYC-style intent.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTerminal blocks PN 5191 or PN 2151 provide secure mounting and isolation\u003c\/li\u003e\n  \u003cli\u003eBlock mounting preserves safe clearances and reduces arcing risk\u003c\/li\u003e\n  \u003cli\u003eBlocks include hardware and spacing designed for MRBF fuses\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat does the visible blown indicator look like and why is it useful?\u003c\/h3\u003e\n\u003cp\u003eThe MRBF fuse exposes a clear mechanical indicator when the element opens, giving an immediate visual cue that the main fuse has operated. That saves diagnostic time and helps crews restore service faster by identifying the failed fuse without disassembly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eImmediate visual confirmation of a blown condition\u003c\/li\u003e\n  \u003cli\u003eSpeeds troubleshooting and safe replacement procedures\u003c\/li\u003e\n  \u003cli\u003eReduces time spent isolating faults on large battery installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I choose this fuse for my system — sizing and compatibility?\u003c\/h3\u003e\n\u003cp\u003eChoose the MRBF 60A when your DC main protection requires a 60 amp continuous rating and needs a high interrupt capacity for larger battery banks. Confirm the fuse block model (PN 5191 or PN 2151) fits your bus bar layout and mechanical space before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMatch continuous amp rating (60 A) to expected load and cable ampacity\u003c\/li\u003e\n  \u003cli\u003eVerify physical fit and terminal style with PN 5191 or PN 2151 fuse block\u003c\/li\u003e\n  \u003cli\u003eEnsure downstream devices and wiring are sized to coordinate with a 60A fuse\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Marine electricians, boat owners, and system integrators installing or upgrading DC main protection on larger battery banks will benefit from the MRBF 60A’s high interrupt capacity and quick visual fault indication. It’s ideal when ABYC-style protection levels are required and when you plan to install the fuse inside a compatible Blue Sea terminal fuse block for safe, code-conscious wiring.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mount the MRBF 60A directly on the battery terminal?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This fuse must be installed in a compatible terminal fuse block (PN 5191 or PN 2151) for safe clearance and proper operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What does 10,000 AIC at 14 V DC mean for my boat?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It means the fuse can safely interrupt very high fault currents at 14 V DC, protecting wiring and equipment on large battery banks.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55165017260375,"sku":"B001B04Z5Y","price":31.74,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-mrbf-60a-front-profile.jpg?v=1790354462"},{"product_id":"blue-sea-systems-5177-50a-battery-terminal-fuse-10-000-aic-compact-cartridge-for-marine-dc-protection","title":"Blue Sea Systems 5177 50A Battery Terminal Fuse — 10,000 AIC, compact cartridge for marine DC protection","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems 5177 is a 50‑amp battery terminal fuse engineered to deliver high-interrupting DC protection for marine and large battery bank applications when used with the required terminal fuse blocks.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned by Blue Sea Systems for boats and heavy-duty DC power systems, the 5177 combines a compact form factor with a high 10,000 AIC rating at 14 VDC to meet ABYC expectations for main circuit protection. The unit is a cartridge-style terminal fuse that must be installed into an approved terminal fuse block (PN 5191 or PN 2151) rather than being mounted directly to a battery post. Its small footprint and robust interrupting capacity make it suitable where space is limited but reliable fault clearing is essential.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the 5177 protect a boat's battery bank?\u003c\/h3\u003e\n\u003cp\u003eThe 5177 interrupts high-current faults quickly to prevent wiring and equipment damage. With a 10,000 AIC rating at 14 VDC it can clear short circuits in larger DC mains in accordance with ABYC guidance for main protection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10,000 AIC (14 VDC) for fast fault interruption\u003c\/li\u003e\n  \u003cli\u003e50‑amp rating for main or sub‑main DC circuits\u003c\/li\u003e\n  \u003cli\u003eCartridge form factor for easy replacement in a fuse block\u003c\/li\u003e\n  \u003cli\u003eDesigned for marine and heavy‑duty battery bank environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation requirements should I know?\u003c\/h3\u003e\n\u003cp\u003eDo not attach the fuse directly to the battery terminal; the 5177 must be mounted in an approved terminal fuse block (PN 5191 or PN 2151). Proper mounting and wiring ensure the fuse operates as intended and maintains compliance with marine electrical standards.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequires Terminal Fuse Block PN 5191 or PN 2151\u003c\/li\u003e\n  \u003cli\u003eDo not mount directly on the battery post\u003c\/li\u003e\n  \u003cli\u003eFollow ABYC and local wiring practices for current-carrying conductors\u003c\/li\u003e\n  \u003cli\u003eUse correct lug sizes and torque values specified by the fuse block\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill the 5177 fit in tight spaces and how big is it?\u003c\/h3\u003e\n\u003cp\u003eThe 5177 is compact, making it suitable for crowded electrical compartments and tight fuse panels. The listed package dimensions show its small physical footprint, allowing flexible placement inside a compatible fuse block or enclosure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompact cartridge design for limited-space installations\u003c\/li\u003e\n  \u003cli\u003ePackage dimensions: approximately 2.032 cm L x 3.556 cm W x 7.62 cm H\u003c\/li\u003e\n  \u003cli\u003eFits Blue Sea terminal fuse blocks for neat, serviceable mounting\u003c\/li\u003e\n  \u003cli\u003eEasy to swap during maintenance without complex tools\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this fuse meet safety and compliance needs?\u003c\/h3\u003e\n\u003cp\u003eThe 5177’s 10,000 AIC rating at 14 VDC provides the interrupting capacity required for many marine DC main circuits under ABYC guidance. Using the fuse in the correct terminal block and following installation best practices supports a safer DC distribution system.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10,000 AIC rating aligns with ABYC requirements for DC main protection\u003c\/li\u003e\n  \u003cli\u003eMounting in specified fuse blocks preserves tested performance\u003c\/li\u003e\n  \u003cli\u003eSimple replacement reduces downtime for critical systems\u003c\/li\u003e\n  \u003cli\u003eEngineered for marine electrical environments and vibrations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Blue Sea Systems 5177 50‑amp terminal fuse is intended for boat owners, marine electricians, and anyone managing larger DC battery banks who needs compact, high‑interrupting protection. If you use Blue Sea PN 5191 or PN 2151 terminal fuse blocks and require a serviceable 50A main or sub‑main fuse that meets ABYC interrupting guidance, the 5177 is a straightforward, field‑replaceable option. It’s not suitable as a stand‑alone battery terminal device—always pair it with the specified fuse block and follow recommended installation practices.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mount the 5177 directly to the battery terminal?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The 5177 must be installed in a compatible terminal fuse block (PN 5191 or PN 2151), not directly on the battery post.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What interrupting capacity does this fuse provide?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The 5177 provides 10,000 AIC at 14 VDC, suitable for ABYC‑guided main circuit protection on larger battery banks.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55165026664791,"sku":"B0016HX6DY","price":31.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-5177-front-profile.jpg?v=1790354482"},{"product_id":"blue-sea-systems-minibus-5-gang-100a-bus-bar-with-clear-cover-compact-tin-plated-copper-distribution","title":"Blue Sea Systems Minibus 5-Gang 100A Bus Bar with Clear Cover — Compact Tin‑Plated Copper Distribution","description":"\u003cstrong\u003eBlue Sea Systems Minibus 5-Gang Bus Bar with Cover delivers compact, protected 100A terminal distribution for marine, automotive, and industrial DC or AC panels.\u003c\/strong\u003e\n\n\u003cp\u003eThis five-screw Mini BusBar (part number 2314) gives you a small-footprint electrical central point rated for up to 100A continuous and compatible with systems up to 300V AC or 48V DC. Built on a reinforced polycarbonate base and fitted with tin-plated pure copper conductors under a clear polycarbonate cover, the unit balances conductivity, corrosion resistance and visual circuit inspection in tight equipment bays.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this bus bar keep multiple circuits organized?\u003c\/h3\u003e\n\u003cp\u003eThe Minibus centralizes up to five terminal connections onto a single copper bar so you avoid daisy-chaining or cluttered wiring looms. Each screw secures a conductor independently for reliable mechanical and electrical contact, while the clear cover keeps the connections visible without exposing them to accidental contact.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFive #8-32 terminal screws for separate branch circuits\u003c\/li\u003e\n  \u003cli\u003eTwo #10-32 studs for feed or common connections\u003c\/li\u003e\n  \u003cli\u003eClear polycarbonate cover allows visual inspection\u003c\/li\u003e\n  \u003cli\u003eCompact footprint reduces panel crowding\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat electrical ratings and compatibility should I expect?\u003c\/h3\u003e\n\u003cp\u003eThe Minibus is rated for continuous 100A operation and accepts systems up to 300V AC or 48V DC, making it suitable for many low-voltage distribution tasks. Terminal hardware sizing and plated copper conductors support good conductivity while helping resist corrosion in challenging environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eContinuous rating: 100A AC\/DC\u003c\/li\u003e\n  \u003cli\u003eMaximum voltage: 300V AC \/ 48V DC\u003c\/li\u003e\n  \u003cli\u003eTerminal screws: 5 x #8-32; studs: 2 x #10-32\u003c\/li\u003e\n  \u003cli\u003eTin-plated pure copper for improved contact resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow is the unit mounted and protected in service?\u003c\/h3\u003e\n\u003cp\u003eThe reinforced polycarbonate base provides a sturdy insulation platform and the included clear cover snaps over the terminals to shield them from accidental shorts. Two mounting holes accept #10 (M5) screws so you can fasten the bus bar to bulkheads, panels or enclosures with standard hardware.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReinforced polycarbonate base for mechanical strength\u003c\/li\u003e\n  \u003cli\u003eClear polycarbonate cover protects terminals while maintaining visibility\u003c\/li\u003e\n  \u003cli\u003eTwo mounting holes compatible with #10 (M5) screws\u003c\/li\u003e\n  \u003cli\u003eDesigned for compact installations in confined spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and corrosion protections are used?\u003c\/h3\u003e\n\u003cp\u003eThe conductive elements are pure copper plated with tin to combine excellent electrical conductivity with a surface finish that reduces oxidation. The insulating base and cover are polycarbonate for durability and impact resistance, useful in marine or mobile environments where vibration and exposure are concerns.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTin-plated pure electrical copper conductors for low resistance\u003c\/li\u003e\n  \u003cli\u003eReinforced polycarbonate base for insulation and strength\u003c\/li\u003e\n  \u003cli\u003eClear polycarbonate cover for impact resistance and inspection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: technicians, boat builders, fleet mechanics and hobbyists who need a compact, serviceable distribution point capable of handling up to 100A continuous. If you’re consolidating multiple positive or negative feeds, creating a neat wiring layout in an electrical panel, or replacing worn terminal blocks with a corrosion-resistant copper solution, the Blue Sea Systems Minibus 5-Gang Bus Bar with Cover offers a durable, space-saving option engineered for reliable connections in demanding installations.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this bus bar handle 12V and 120V systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It’s rated up to 48V DC (common for 12V\/24V systems) and up to 300V AC, suitable for many low-voltage AC installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What hardware is required to mount it?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Two #10 (M5) screws fit the mounting holes; use appropriate washers and lock hardware for vibration-prone environments.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55165642047831,"sku":"B000OTJ89Q","price":35.16,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-minibus-front-cover.jpg?v=1790356812"},{"product_id":"blue-sea-systems-powerpost-dual-connector-3-8-inch-black-red-heavy-duty-dual-post-for-high-amp-wiring","title":"Blue Sea Systems POWERPOST Dual Connector 3\/8 inch Black\/Red — Heavy‑Duty Dual Post for High‑Amp Wiring","description":"\u003cb\u003eBlue Sea Systems 2017 POWERPOST Dual Connector 3\/8\" is a heavy‑duty dual post that securely joins high‑amp conductors while keeping positive and negative lines clearly insulated.\u003c\/b\u003e\n\n\u003cp\u003eThe POWERPOST 2017 by Blue Sea Systems is built to simplify high‑current connections where space, clarity, and reliability matter. This dual connector supplies a dedicated 3\/8\" stud for two separate runs and ships with a red and a black insulator so you can immediately identify circuit polarity. It’s designed for installations that require clean, robust terminations of heavy‑gauge cables and repeatable service access.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the POWERPOST make high‑amp wiring easier?\u003c\/h3\u003e\n\u003cp\u003eThe dual post combines two 3\/8\" studs into a compact mounting footprint so you can terminate multiple heavy conductors without using separate posts. The included color insulators speed up troubleshooting and maintenance by visually distinguishing positive from negative connections.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo 3\/8\" studs in one compact assembly\u003c\/li\u003e\n  \u003cli\u003eIncluded red and black insulators for instant polarity identification\u003c\/li\u003e\n  \u003cli\u003eSimplifies routing and reduces terminal clutter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this connector handle heavy gauge cables reliably?\u003c\/h3\u003e\n\u003cp\u003eThe POWERPOST is made to accept high‑amp conductors and provides a stable, repeatable termination point for them. It’s intended for applications where tight, secure bolted connections are required to maintain low resistance and dependable current flow.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8\" studs sized for heavy gauge lugs and ring terminals\u003c\/li\u003e\n  \u003cli\u003eSecure bolt fastening ensures consistent electrical contact\u003c\/li\u003e\n  \u003cli\u003eSuitable for repeated tightening and service cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the color coding help during installation and service?\u003c\/h3\u003e\n\u003cp\u003eClear color coding reduces wiring errors and speeds troubleshooting by making polarity identification immediate. The separate red and black insulators fit the posts so installers and technicians can quickly verify circuits at a glance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRed and black insulators included for positive\/negative identification\u003c\/li\u003e\n  \u003cli\u003eRemovable covers let you access the studs for adjustments or measurement\u003c\/li\u003e\n  \u003cli\u003eVisual differentiation helps prevent cross‑wiring during assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I plan for when mounting and using this post?\u003c\/h3\u003e\n\u003cp\u003ePlan a mounting location that allows access to both studs for tightening and inspection, and use appropriately sized lugs or ring terminals for your cable gauge. Leave space for heat shrink or protective barriers if your application needs extra mechanical protection or insulation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMount on a flat surface with adequate clearance for tools\u003c\/li\u003e\n  \u003cli\u003eUse matching 3\/8\" lug\/ring terminals for secure terminations\u003c\/li\u003e\n  \u003cli\u003eAllow access for periodic inspection and torque checks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Installers, electricians, marine technicians, and hobbyists who run high‑current circuits and need a compact, clearly marked connection point will find the Blue Sea Systems 2017 POWERPOST Dual Connector useful. It’s especially appropriate when you require robust bolted terminations, quick polarity identification, and tidy wiring layouts for battery banks, distribution panels, or equipment power feeds.\u003c\/p\u003e\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What cable lug size fits the 3\/8\" POWERPOST?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use lugs or ring terminals sized for a 3\/8\" stud and matched to your cable gauge for secure connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are the red and black insulators included?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the product includes one red and one black insulator for immediate polarity identification.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55166153556311,"sku":"B0016HX68E","price":36.31,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-powerpost-front-connector_jpg.jpg?v=1790364446"},{"product_id":"blue-sea-systems-5175-30a-battery-terminal-fuse-10-000-aic-at-14v-dc-visible-blown-indicator","title":"Blue Sea Systems 5175 30A Battery Terminal Fuse — 10,000 AIC at 14V DC, visible blown indicator","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems 5175 is a 30-amp battery terminal fuse designed to protect large DC battery banks with a 10,000 AIC rating at 14V DC and a visible blown indicator.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eEngineered for marine and mobile electrical systems, the Blue Sea Systems 5175 terminal fuse gives clear, code-friendly protection where heavy-current faults can occur. It meets ABYC-level interrupting capacity for DC main circuit protection, provides an easy visual signal if the fuse opens, and must be installed in a compatible terminal fuse block rather than attached directly to the battery post. Compact and robust, it fits installations where reliable high-current safety is required.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this fuse meet ABYC requirements for large battery banks?\u003c\/h3\u003e\n\u003cp\u003eThe 5175 is rated at 10,000 amperes interrupting capacity (AIC) at 14V DC, which fulfills ABYC expectations for DC main circuit protection on larger battery installations. That high AIC rating means the device can safely interrupt severe short-circuit currents without allowing catastrophic damage to wiring or upstream components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10,000 AIC rating at 14V DC for main DC circuits\u003c\/li\u003e\n  \u003cli\u003eSpecifically intended for larger battery banks and high-current systems\u003c\/li\u003e\n  \u003cli\u003eVisible blown indicator to speed troubleshooting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere and how should I install the 5175 fuse?\u003c\/h3\u003e\n\u003cp\u003eThis fuse requires a compatible terminal fuse block — either PN 5191 or PN 2151 — and should not be mounted directly on the battery terminal. Installing it in the correct block ensures secure mechanical attachment, proper electrical contact, and safe clearing behavior under fault conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse only with Terminal Fuse Blocks PN 5191 or PN 2151\u003c\/li\u003e\n  \u003cli\u003eDo not mount directly to battery posts or lug connections\u003c\/li\u003e\n  \u003cli\u003eCompact dimensions: 2.032 cm L x 3.556 cm W x 7.112 cm H for tight panel spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat user features help with maintenance and troubleshooting?\u003c\/h3\u003e\n\u003cp\u003eThe 5175 provides a visible indication when the fuse has blown, making it quick to spot without disassembly. Its design focuses on simple inspection and replacement through the compatible fuse block, reducing downtime and simplifying fault isolation on board or in a vehicle.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClear blown indicator for immediate visual fault recognition\u003c\/li\u003e\n  \u003cli\u003eQuick replacement when mounted in supported fuse blocks\u003c\/li\u003e\n  \u003cli\u003eRugged construction suited to marine and mobile environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat electrical and physical details should I know before buying?\u003c\/h3\u003e\n\u003cp\u003eThis is a 30-amp electronic switch-style terminal fuse sized for high-interrupt capability at low voltage DC systems. Check compatibility with your existing terminal fuse block or plan to add PN 5191 or PN 2151 for proper installation and performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRated current: 30 amps\u003c\/li\u003e\n  \u003cli\u003eProduct type: electronic switch-style fuse\u003c\/li\u003e\n  \u003cli\u003ePackage dimensions: 2.032 cm L x 3.556 cm W x 7.112 cm H\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Blue Sea Systems 5175 is aimed at boaters, RV owners, and professionals wiring larger DC battery banks who need ABYC-level interrupting capacity and rapid fault identification. If you require robust main circuit protection with straightforward inspection and an installation that uses a dedicated terminal fuse block, the 5175 is built for that purpose.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mount the 5175 directly to the battery terminal?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The 5175 must be installed in Terminal Fuse Block PN 5191 or PN 2151 and not mounted directly to the battery post.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the 5175 meet ABYC interrupting capacity requirements?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It is rated 10,000 AIC at 14V DC, satisfying ABYC expectations for DC main circuit protection on large banks.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55166401970519,"sku":"B00198FP8Y","price":39.23,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-5175-front-view.jpg?v=1790368008"},{"product_id":"blue-sea-systems-anl-250a-fuse-250-amp-heavy-duty-dc-protection-with-silver-plated-blades","title":"Blue Sea Systems ANL 250A Fuse — 250‑Amp Heavy‑Duty DC Protection with Silver‑Plated Blades","description":"\u003cp\u003e\u003cstrong\u003eThe Blue Sea Systems 5131 ANL 250-AMP fuse is a silver-plated, high-current ANL fuse designed to protect heavy DC electrical circuits in marine, automotive, and industrial applications.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eReliable overcurrent protection matters where large batteries and powerful alternators are used. The 5131 ANL 250A fuse from Blue Sea Systems combines a hefty 250-amp interrupt rating with corrosion-resistant silver-plated connector blades and a compact package to fit common ANL fuse holders. Built in Mexico with a focus on durability, it suits installations that demand dependable, low-resistance connections and straightforward replacement.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this ANL 250A fuse protect high-current systems?\u003c\/h3\u003e\n\u003cp\u003eThis fuse interrupts excessive current flow to prevent wiring and components from overheating when a fault occurs. It’s engineered for DC applications and breaks the circuit cleanly at or above its rated 250 amps, reducing risk to wiring, batteries, and power equipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e250-amp current rating for heavy-duty circuits\u003c\/li\u003e\n  \u003cli\u003eDesigned for fast, reliable interruption under overload\u003c\/li\u003e\n  \u003cli\u003eSilver-plated blades lower contact resistance for stable connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat features help it resist corrosion and maintain conductivity?\u003c\/h3\u003e\n\u003cp\u003eContact corrosion can compromise performance over time, especially in marine environments. The 5131 uses silver-plated connector blades to minimize oxidation and keep contact resistance low, extending consistent electrical transfer and reducing heat buildup at the terminal.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSilver plating resists tarnish and oxidation\u003c\/li\u003e\n  \u003cli\u003eSolid construction for repeatable insertions and removals\u003c\/li\u003e\n  \u003cli\u003eCompact footprint fits standard ANL fuse holders\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I choose and install this fuse for my boat or vehicle?\u003c\/h3\u003e\n\u003cp\u003eSelect an ANL fuse with a 250A rating when your expected circuit loads and charging currents approach that value, and use compatible ANL fuse holders or busbar connections. Installation is straightforward: shut down the system, seat the fuse securely in the holder, and confirm tight terminal connections to avoid arcing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMatch the 250A rating to cable and equipment ampacity\u003c\/li\u003e\n  \u003cli\u003eUse properly rated ANL fuse holder or terminal block\u003c\/li\u003e\n  \u003cli\u003eEnsure firm, corrosion-free terminal contact when installing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the package and origin details I should know?\u003c\/h3\u003e\n\u003cp\u003eThe Blue Sea Systems 5131 arrives in a compact package suitable for storage and shipping. It is manufactured in Mexico and packaged with dimensions that make it easy to handle and inventory, while retaining the robust construction expected for heavy-duty fuses.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePackage dimensions: 3.302 H x 7.62 L x 11.938 W cm\u003c\/li\u003e\n  \u003cli\u003ePackage weight: approximately 0.6 pounds for single-unit handling\u003c\/li\u003e\n  \u003cli\u003eCountry of origin: Mexico, with Blue Sea Systems quality control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Installers, boat owners, RV users, and automotive technicians who need a dependable 250-amp ANL fuse for battery protection, main power feeds, or charging systems will find the Blue Sea Systems 5131 appropriate. It’s aimed at anyone installing or maintaining high-current DC circuits that require durable contacts, low resistance, and a standard ANL form factor for quick replacement and long-term reliability.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the 5131 ANL fuse suitable for marine use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Its silver-plated blades resist corrosion, making it appropriate for marine DC systems when installed in a compatible ANL holder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I replace a different ANL fuse with this 250A unit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Only replace with a 250A fuse if the circuit and wiring are rated for 250 amps; otherwise choose the fuse rating that matches system design.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55166804427095,"sku":"B000K2K6Q6","price":36.77,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-anl-250a-front-label_jpg.jpg?v=1790371632"},{"product_id":"blue-sea-systems-400a-anl-fuse-stud-mount-32v-dc-6-000a-interrupt-visible-blown-indicator","title":"Blue Sea Systems 400A ANL Fuse, Stud-Mount 32V DC — 6,000A Interrupt, Visible Blown Indicator","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems 400A ANL stud-mount fuse delivers heavy-duty 32V DC protection with a 6,000 A interrupt rating and clear blown indication for marine and vehicle battery systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for demanding DC power installations, this ANL fuse (Model 5136) combines robust interrupt capacity with corrosion-resistant silver-plated blades and ignition protection for gasoline-powered boats. It’s a single 400-amp replacement fuse that fits popular Blue Sea fuse blocks and is shaped for stud-mount applications where dependable main-battery circuit protection is required.\u003c\/p\u003e\n\n\u003ch3\u003eWhat does this fuse protect against in a DC power system?\u003c\/h3\u003e\n\u003cp\u003eThe 400A ANL fuse is sized to protect main battery feeds and large sub-distribution circuits from excessive current and potential wiring damage. With a 6,000 ampere interrupt capacity (AIC) at up to 32V DC, it can clear very high fault currents so downstream wiring and components are less likely to sustain severe damage.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRated 400 amps for continuous DC circuits\u003c\/li\u003e\n  \u003cli\u003e6,000 AIC at 32V DC meets ABYC-type protection expectations\u003c\/li\u003e\n  \u003cli\u003eVisible blown indicator allows quick visual diagnostics\u003c\/li\u003e\n  \u003cli\u003eStud-mount form factor for main bus and distribution blocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does it handle marine and gasoline-engine installations?\u003c\/h3\u003e\n\u003cp\u003eThis fuse meets ignition-protection criteria for safe use aboard gasoline-powered vessels (SAE J1171 conformity for 35–500A sizes), reducing the risk of igniting flammable vapors if a fault occurs. Silver-plated blades resist corrosion in marine environments, preserving low-resistance connections and long-term reliability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIgnition-protected per SAE J1171 for applicable amp ranges\u003c\/li\u003e\n  \u003cli\u003eSilver-plated connectors for improved corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eSuitable for main battery banks and large DC feeders on boats\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this fit my existing Blue Sea fuse block or panel?\u003c\/h3\u003e\n\u003cp\u003eThe 5136 ANL fuse is shaped to match common stud-mount housings and is compatible with Blue Sea Systems fuse blocks such as models 5004 and 5005. Confirm your block accepts ANL stud fuses and that a 400A rating is appropriate for the circuit being protected.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eForm factor: stud-mount ANL style, 3.185\" long × 0.89\" wide\u003c\/li\u003e\n  \u003cli\u003eDirect fit for Blue Sea 5004 and 5005 fuse blocks\u003c\/li\u003e\n  \u003cli\u003eReplace only with equal or suitably rated fuse per system design\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat practical features make installation and service easier?\u003c\/h3\u003e\n\u003cp\u003eThe fuse includes a visible blown condition indicator to speed troubleshooting without disassembly, and the silver-plated blades help ensure reliable electrical contact over time. Its compact ANL body makes it easy to install in tight fuse panels or on buss bars where space is limited.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eVisible blown indicator for fast fault identification\u003c\/li\u003e\n  \u003cli\u003eCompact ANL stud mount fits crowded panels and buss bars\u003c\/li\u003e\n  \u003cli\u003eSilver-plated blades reduce contact corrosion and resistance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Installers, boat owners, RV technicians, and anyone managing large DC battery banks who need a dependable 400A main or feeder fuse will find this Blue Sea Systems ANL fuse appropriate. It’s aimed at applications that require high interrupt capacity, corrosion-resistant connections, and easy visual fault detection, and it pairs directly with Blue Sea 5004\/5005 fuse blocks or similar stud-mount ANL housings.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this fuse compatible with Blue Sea 5004 and 5005 blocks?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 5136 ANL 400A fuse is a stud-mount design that fits Blue Sea 5004 and 5005 fuse blocks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the maximum voltage and interrupt rating?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Rated to 32V DC with a 6,000 ampere interrupt capacity for high fault clearance.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55168707920215,"sku":"B000K2NZAU","price":49.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-anl-fuse-front-profile.jpg?v=1790412351"},{"product_id":"blue-sea-systems-7188-thermal-circuit-breaker-surface-mount-48v-120a-ignition-protected-water-resistant","title":"Blue Sea Systems 7188 Thermal Circuit Breaker — Surface Mount 48V 120A, Ignition-Protected, Water-Resistant","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems 7188 (285 Series) is a surface-mount thermal circuit breaker that combines a reliable on\/off switch with automatic trip protection for 48V DC circuits up to 120A.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact, medium-duty breaker is made for marine and industrial use where space, safety and simplicity matter. It replaces the older 185-series units and is designed to act as both a manual switch and a protective device that visibly indicates a trip. The unit is ignition-protected, water resistant and fitted with terminal caps and face-mounted studs for straightforward installation and safer wiring. Backed by a five-year warranty, it’s intended for equipment such as windlasses, electric winches and other high-current 48V DC applications.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this breaker act as both a switch and circuit protector?\u003c\/h3\u003e\n\u003cp\u003eThe 7188 serves as a manual on\/off control while continuously monitoring current; when an overload or fault occurs the thermal element trips and opens the circuit. The trip-free design prevents the lever from being held in the ON position during a fault, ensuring the breaker cannot be overridden until the condition is cleared and it cools.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIntegrated lever for manual switching and visible trip indication\u003c\/li\u003e\n  \u003cli\u003eThermal sensing element that opens on overload\u003c\/li\u003e\n  \u003cli\u003eTrip-free mechanism prevents forced reset under fault\u003c\/li\u003e\n  \u003cli\u003eRated for 48V DC systems at 120 amps nominal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I install this in an engine room or exposed marine environment?\u003c\/h3\u003e\n\u003cp\u003eYes — the 7188 is ignition protected and water resistant, making it suitable for installation near gasoline engines and other marine machinery. The robust housing and terminal caps reduce the risk of accidental contact and corrosion, but standard waterproofing practices and correct placement still apply for long-term reliability.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIgnition-protected for safe engine-room installation\u003c\/li\u003e\n  \u003cli\u003eWater-resistant construction for marine exposure\u003c\/li\u003e\n  \u003cli\u003eTerminal caps prevent accidental shorts and contamination\u003c\/li\u003e\n  \u003cli\u003eSurface-mount form factor fits tight panels and bulkheads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes installation fast and user-friendly?\u003c\/h3\u003e\n\u003cp\u003eTerminals are located on the face of the breaker for simple access and wiring, eliminating the need to reach around a unit in confined spaces. A surface-mount design and compatibility with the earlier 185 series mean you can replace older breakers without redesigning the mounting layout.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFace-mounted terminal studs for easy connection and inspection\u003c\/li\u003e\n  \u003cli\u003eCompatible drop-in replacement for the 185-series breakers\u003c\/li\u003e\n  \u003cli\u003eConnected terminal caps help maintain safe wiring during installation\u003c\/li\u003e\n  \u003cli\u003eCompact footprint suited to crowded electrical panels\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and serviceable is this breaker over time?\u003c\/h3\u003e\n\u003cp\u003eThe 7188 is built for repeated switching and protective operation in harsh environments. Blue Sea Systems builds marine-grade products to resist vibration, salt air and repeated thermal cycling; the five-year warranty also reflects expected long-term performance when installed and used according to specifications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMarine-grade materials resist corrosion and vibration\u003c\/li\u003e\n  \u003cli\u003eDesigned for frequent manual operation and automatic tripping\u003c\/li\u003e\n  \u003cli\u003eFive-year manufacturer warranty for added confidence\u003c\/li\u003e\n  \u003cli\u003eReplaceable unit-level approach simplifies service and upgrades\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Blue Sea Systems 7188 285 Series breaker is aimed at boat owners, marine electricians and equipment installers who need a compact, reliable 48V DC protection and switching device for high-current loads like windlasses and winches. It’s also a practical upgrade option for anyone replacing legacy 185-series breakers or looking for an ignition-protected, surface-mount solution that keeps wiring neat and safe.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the 7188 suitable for use with gasoline engine rooms?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 7188 is ignition protected, allowing installation in gasoline engine compartments when installed per guidelines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can it replace an 185 series breaker directly?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 7188 is a drop-in replacement for the 185 series, matching mounting and electrical footprint.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55170346680663,"sku":"B00511Q5MU","price":78.61,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-7188-front-view.jpg?v=1790428291"},{"product_id":"blue-sea-systems-add-a-battery-kit-120a-automatic-dual-bank-marine-battery-manager-corrosion-resistant","title":"Blue Sea Systems Add-A-Battery Kit 120A — Automatic Dual-Bank Marine Battery Manager, Corrosion-Resistant","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems Add-A-Battery Kit, 120A is an automatic dual-bank battery management kit that combines a Dual Circuit Plus switch with an Automatic Charging Relay to charge both starter and house batteries while isolating them at rest.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for inboard engines and larger outboards, this kit provides a straightforward, reliable way to manage two battery banks without external isolators or complex regulators. It senses charging voltage, links batteries while the engine or charger is running, and separates them when voltage falls—protecting electronics and preserving starting power. Built with marine-grade components and a 120 amp continuous rating, the system is meant to handle the demands of harsh, corrosive marine environments.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the Add-A-Battery Kit keep my starter and house batteries properly managed?\u003c\/h3\u003e\n\u003cp\u003eThe kit uses a Dual Circuit Plus switch to let the starter and house banks operate independently while providing a single ON\/OFF control for routine use. An integrated Automatic Charging Relay detects when charging voltage is present and momentarily parallels the banks so both receive charge. When charging stops, it isolates the banks to prevent house loads from depleting the starter battery.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDual Circuit Plus switch separates starter and house circuits with one simple control\u003c\/li\u003e\n  \u003cli\u003eAutomatic Charging Relay senses voltage and combines banks only during charging\u003c\/li\u003e\n  \u003cli\u003ePrevents parasitic discharge onto the starter battery when at rest\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat happens if one battery is dead and I need to start the engine?\u003c\/h3\u003e\n\u003cp\u003eThe kit includes an emergency combine or parallel feature that lets you link both batteries temporarily for engine starting if one bank is discharged. This manual combine protects against being stranded while still allowing normal isolation during everyday operation. Use the combine only briefly to start, then return the switch to normal to restore isolation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIntegrated emergency combine connects both banks for starting power\u003c\/li\u003e\n  \u003cli\u003eManual operation ensures you control when batteries are paralleled\u003c\/li\u003e\n  \u003cli\u003eReturn to normal position after start to prevent unnecessary battery drain\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this kit durable enough for marine conditions and heavy use?\u003c\/h3\u003e\n\u003cp\u003eYes — the Add-A-Battery Kit is built specifically for marine exposure, using corrosion-resistant tin-plated copper studs and components designed for continuous current up to 120 A. Materials and finishes help reduce corrosion and maintain conductivity in salty, humid environments, so the kit continues to perform reliably season after season. Its construction supports installation on inboards and larger outboards where higher continuous currents are common.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTin-plated copper studs resist corrosion and maintain good conductivity\u003c\/li\u003e\n  \u003cli\u003e120 A continuous rating suits inboards and larger outboard setups\u003c\/li\u003e\n  \u003cli\u003eRugged design for marine vibration and moisture conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does installation simplify my boat's electrical layout?\u003c\/h3\u003e\n\u003cp\u003eThe Add-A-Battery Kit reduces wiring complexity by combining switching and automatic charging relay functions into a single, coherent kit. Instead of separate isolators or complex regulator wiring, this solution centralizes battery management and provides clear ON\/OFF and emergency combine control. That decreases the chance of switching errors and makes routine operation easier for owners and crew.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCombines switch and relay functions to cut down on extra components\u003c\/li\u003e\n  \u003cli\u003eSingle ON\/OFF operation streamlines everyday battery control\u003c\/li\u003e\n  \u003cli\u003eClear manual combine option reduces confusion during emergencies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The Blue Sea Systems Add-A-Battery Kit, 120A is ideal for boat owners with separate starter and house banks—especially those with inboard engines or larger outboards who need reliable automatic charging and straightforward emergency paralleling. It suits sailors, cruisers, and powerboat operators seeking a durable, low-complexity way to keep both batteries charged while protecting starting capacity and sensitive electronics.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this kit charge both batteries from my alternator?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The Automatic Charging Relay senses alternator voltage and parallels the banks during charging so both batteries receive charge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I combine batteries manually if one is flat?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The kit includes an emergency combine feature to link both banks temporarily for starting.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55170371223895,"sku":"B000RZNP5K","price":208.48,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-add-a-battery-front.jpg?v=1790428598"},{"product_id":"blue-sea-systems-maxibus-insulating-cover-2719-clear-polycarbonate-top-reinforced-nylon-base-for-maxibus-busbars","title":"Blue Sea Systems MaxiBus Insulating Cover 2719 — Clear Polycarbonate Top, Reinforced Nylon Base for MaxiBus Busbars","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems 2719 Insulating Cover protects MaxiBus busbars and mounted breakers with a reinforced nylon base and clear polycarbonate top for reliable electrical insulation.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis insulating cover is engineered to fit Blue Sea Systems MaxiBus BusBar assemblies using the 6-screw (part 2128) or 4-stud (part 2127) attachment options. It provides a transparent protective top and a rugged nylon base that keeps wiring and connection points isolated while allowing visual inspection. The design includes molded breakouts for routing conductors cleanly and mounting holes sized to accept 285 Series surface-mount circuit breakers and DC shunts, helping you organize and secure the DC distribution area to ABYC insulation standards.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the 2719 cover improve safety around my busbar?\u003c\/h3\u003e\n\u003cp\u003eThe cover creates a physical barrier over live bus connections to reduce accidental contact and shorting risks. Its clear polycarbonate top lets you see terminal status without removing the cover, and the reinforced nylon base resists impact and chemical exposure common in marine and mobile environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePrevents direct access to live terminals and exposed conductors\u003c\/li\u003e\n  \u003cli\u003eBreakouts route wires away from adjacent metal surfaces\u003c\/li\u003e\n  \u003cli\u003eMaterials meet ABYC insulation expectations for marine applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this cover fit my MaxiBus BusBar and accessories?\u003c\/h3\u003e\n\u003cp\u003eThe 2719 is built specifically for MaxiBus panels and installs with either the 6-screw 2128 or the 4-stud 2127 fastening options. The base includes dedicated mounting locations to accept 285 Series surface-mount breakers and the common DC shunt hardware, so you can integrate protective devices directly beneath the cover.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with MaxiBus busbars using part 2128 or 2127 fasteners\u003c\/li\u003e\n  \u003cli\u003eMounting holes accommodate 285 Series breakers and DC shunts\u003c\/li\u003e\n  \u003cli\u003ePrecise cutouts for tidy conductor routing and strain relief\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable is the cover in marine or mobile environments?\u003c\/h3\u003e\n\u003cp\u003eConstruction combines a reinforced nylon base with a clear polycarbonate lid for long service life in corrosive or vibration-prone settings. Both materials resist UV, oils, and typical workshop chemicals, while the mechanical design minimizes flexing and abrasion at connection points.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReinforced nylon resists cracking and chemical attack\u003c\/li\u003e\n  \u003cli\u003ePolycarbonate top provides impact resistance and visual access\u003c\/li\u003e\n  \u003cli\u003eRobust fastening pattern maintains secure mounting under vibration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to install and maintain the 2719 insulating cover?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: align the cover over the MaxiBus busbar and secure it using the corresponding 6-screw (2128) or 4-stud (2127) hardware. Routine checks are simplified by the transparent cover—inspect terminal condition and wire routing without disassembly, and access for servicing is quick when removal is required.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eQuick align-and-secure installation with supplied fastener patterns\u003c\/li\u003e\n  \u003cli\u003eClear top allows visual inspection without removal\u003c\/li\u003e\n  \u003cli\u003eRemovable for maintenance or circuit modifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this product for? The Blue Sea Systems 2719 insulating cover is for boat owners, marine electricians, RV installers, and anyone building a compact DC distribution panel who needs a neat, code-conscious way to shield MaxiBus terminals and mounted breakers. It’s ideal when you want durable electrical protection, easy inspection, and compatibility with 285 Series circuit breakers and common DC shunts while meeting ABYC insulation expectations.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the 2719 cover fit both screw and stud MaxiBus configurations?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 2719 fits MaxiBus panels using either the 6-screw (2128) or 4-stud (2127) mounting options.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I mount 285 Series circuit breakers under this cover?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The base includes mounting holes specifically sized for 285 Series surface-mount breakers and common DC shunts.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55171279618391,"sku":"B006VELEFO","price":47.22,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-2719-front-view.jpg?v=1790441991"},{"product_id":"blue-sea-systems-285-series-150a-surface-mount-circuit-breaker-ignition-protected-trip-free-switch","title":"Blue Sea Systems 285-Series 150A Surface-Mount Circuit Breaker — Ignition-Protected, Trip-Free Switch","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems 285-Series 150A surface-mount breaker combines a reliable on\/off switch with automatic circuit protection for marine and industrial DC circuits.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis 285-Series medium-duty circuit breaker is designed to protect high-current DC devices such as windlasses and electric winches while also serving as a convenient switch. Its trip-free mechanism forces the unit to open under fault conditions rather than allowing manual override, and a visible lever clearly indicates a tripped state. Built to withstand wet environments and rated ignition-protected, it’s suitable for installations near gasoline engines and other demanding marine locations.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this breaker act as both a switch and protective device?\u003c\/h3\u003e\n\n\u003cp\u003eThe 285-Series integrates switching and overcurrent protection in a single compact housing. Under normal operation it functions as a manual on\/off control; if excessive current flows, the internal mechanism trips to break the circuit and prevent damage.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eManual toggle operates like a conventional switch for routine control.\u003c\/li\u003e\n  \u003cli\u003eInternal overcurrent element trips automatically when thresholds are exceeded.\u003c\/li\u003e\n  \u003cli\u003eVisible trip lever shows when the unit has opened due to a fault.\u003c\/li\u003e\n  \u003cli\u003eTerminal caps reduce risk of accidental contact and short circuits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this 150A breaker work in engine rooms and wet spaces?\u003c\/h3\u003e\n\n\u003cp\u003eYes—this model is designed with water resistance and ignition protection, enabling installation in engine compartments on gasoline-powered boats and other challenging environments. Its construction reduces the likelihood of sparks and helps protect surrounding components from electrical faults.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIgnition-protected design for safe mounting near gasoline engines.\u003c\/li\u003e\n  \u003cli\u003eWater-resistant housing suitable for marine conditions.\u003c\/li\u003e\n  \u003cli\u003eFace-mounted terminals offer easier wiring in tight spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation and compatibility details should I know?\u003c\/h3\u003e\n\n\u003cp\u003eThe 285-Series 150A is a surface-mount breaker with studs on the front face for quick, straightforward connections. It’s a practical replacement for earlier 185-Series units and fits into many common circuits without complex panel modifications.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFace-located terminal studs simplify routing and tightening of cable lugs.\u003c\/li\u003e\n  \u003cli\u003eDrop-in replacement for the older 185-Series breakers in many systems.\u003c\/li\u003e\n  \u003cli\u003eConnected terminal caps protect against accidental shorts during installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the trip-free feature protect my equipment?\u003c\/h3\u003e\n\n\u003cp\u003eThe trip-free design prevents the breaker from being forcibly held in the ON position if an overload or short occurs, so it reliably opens the circuit when necessary. This behavior reduces risk to wiring, motors, and other connected devices by ensuring the protective action cannot be defeated by manual force.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eBreaker cannot be mechanically overridden when a fault is present.\u003c\/li\u003e\n  \u003cli\u003eEnsures automatic interruption until the underlying issue is corrected.\u003c\/li\u003e\n  \u003cli\u003eQuick visual confirmation of a trip via the exposed lever.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Blue Sea Systems 285-Series 150A surface-mount breaker is aimed at boat owners, marine electricians, and installers of heavy DC equipment who need a compact, reliable combination switch and circuit protector. It’s a suitable choice for windlass and winch circuits, battery banks, and other high-current DC loads where space is limited and ignition protection is required. Backed by a five-year warranty, this breaker is intended for professionals and DIY installers seeking durable, service-friendly protection in marine and industrial settings.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this breaker replace a 185-Series model?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 285-Series is designed as a drop-in replacement for many 185-Series breakers with compatible mounting and terminal arrangements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the 285-Series safe for installation in gasoline engine rooms?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It is ignition-protected and water-resistant, making it suitable for use in gasoline engine compartments and similar marine environments.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55171941925207,"sku":"B0051OWRHE","price":82.02,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-285-series-front-panel-150a.jpg?v=1790449869"},{"product_id":"blue-sea-systems-285-series-40a-surface-mount-circuit-breaker-ignition-protected-trip-free-marine-switch","title":"Blue Sea Systems 285-Series 40A Surface-Mount Circuit Breaker — Ignition Protected, Trip-Free Marine Switch","description":"\u003cp\u003e\u003cstrong\u003eThe Blue Sea Systems 285-Series 40A surface-mount circuit breaker is a combined switch and medium-duty protective device designed for marine applications such as windlasses and electric winches.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact, surface-mounted breaker replaces the 185 series and pairs on\/off switching with tailored circuit protection so a single unit both controls and safeguards a circuit. Its visible lever clearly indicates a trip condition, and the trip-free mechanism prevents the breaker from being forced back ON during a fault. Built to withstand marine environments, the unit is ignition protected and water resistant, allowing flexible installation locations including gasoline-engine compartments.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this breaker protect my windlass or winch without extra fusing?\u003c\/h3\u003e\n\n\u003cp\u003eThe 285-Series acts as a dedicated switch and overcurrent protector in one, interrupting fault currents automatically while still functioning as a manual control. The trip-free design stops the lever from being held ON under overload, eliminating a common bypass risk. Terminal caps and face-mounted studs reduce accidental shorts and simplify wiring.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e40 amp rated for medium-duty loads such as windlasses and winches\u003c\/li\u003e\n  \u003cli\u003eTrip-free action prevents overriding during fault events\u003c\/li\u003e\n  \u003cli\u003eConnected terminal caps protect against contact and cross-current shorts\u003c\/li\u003e\n  \u003cli\u003eFace-mounted studs speed installation and access\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere can I mount the 285-Series on my vessel, and is it safe near engines?\u003c\/h3\u003e\n\n\u003cp\u003eIts surface-mount design and water-resistant housing make it suitable for bulkheads, panels, and many other visible mounting locations. Because the breaker is ignition protected, it is approved for installation in gasoline-engine spaces where spark suppression is required. Still, follow marine wiring practices and manufacturer instructions for ventilation and spacing.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSurface-mount form factor fits panel or bulkhead installations\u003c\/li\u003e\n  \u003cli\u003eWater-resistant housing tolerates marine spray and damp locations\u003c\/li\u003e\n  \u003cli\u003eIgnition protection allows installation in gasoline engine compartments\u003c\/li\u003e\n  \u003cli\u003eVisible lever gives immediate visual status at the mounting location\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to install and maintain this breaker?\u003c\/h3\u003e\n\n\u003cp\u003eThe breaker’s terminal studs on the front face give clear connection points that simplify wiring and reduce time at the helm or in the engine room. The detachable terminal caps cover live studs to help prevent accidental contact during service. Blue Sea Systems builds this unit as a drop-in replacement for the 185 series, so upgrades or replacements require minimal panel modification.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFace-mounted terminal studs for straightforward wiring and inspection\u003c\/li\u003e\n  \u003cli\u003eRemovable terminal caps protect connections and aid safe maintenance\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for 185 series simplifies upgrades\u003c\/li\u003e\n  \u003cli\u003eFive-year manufacturer warranty for long-term reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat electrical and safety features should I expect from the 285-Series?\u003c\/h3\u003e\n\n\u003cp\u003eThe 285-Series provides medium-duty circuit protection with a clear trip indicator and a mechanism that prevents manual override during a fault. It meets practical marine safety needs with water resistance and ignition protection and includes construction details that reduce the chance of shorts and exposure to live terminals.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMedium-duty 40A rating tailored to common deck and accessory loads\u003c\/li\u003e\n  \u003cli\u003eTrip-free mechanism prevents holding the breaker ON under fault conditions\u003c\/li\u003e\n  \u003cli\u003eWater-resistant and ignition protected for marine safety compliance\u003c\/li\u003e\n  \u003cli\u003eFive-year warranty gives added assurance of product longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Blue Sea Systems 285-Series 40A breaker is aimed at boat owners, marine electricians, and installers who need a compact, reliable switch-protector for medium-duty loads — especially for windlasses, electric winches, and similar deck equipment. It suits anyone upgrading from the 185 series, fitting components in engine rooms where ignition protection is required, or seeking a visibly tripped, easy-to-service circuit breaker with covered terminals and straightforward installation.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the 285-Series be mounted in a gasoline engine compartment?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The breaker is ignition protected and suitable for installation in gasoline-engine spaces following manufacturer guidelines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the 285-Series a direct replacement for the 185 series?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 285-Series is designed as a drop-in replacement for the 185 series to simplify upgrades and installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55171942121815,"sku":"B005168AOG","price":77.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-systems-285-front-view.jpg?v=1790449875"},{"product_id":"blue-sea-systems-surface-mount-circuit-breaker-70a-trip-free-with-visible-trip-lever-ignition-protected","title":"Blue Sea Systems surface-mount circuit breaker 70A — Trip-Free with visible trip lever, ignition protected","description":"\u003cp\u003e\u003cstrong\u003eThe Blue Sea Systems 285-Series 70A surface-mount circuit breaker is a combined switch and medium-duty protective device designed for marine equipment like windlasses and electric winches.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eBuilt to simplify installations and protect circuits aboard boats, this surface-mount breaker replaces a manual switch and a fuse with a single unit that trips automatically under overload. Its visible lever lets you see when the breaker has tripped, and the Trip-Free mechanism prevents forcing the breaker back on during a fault. With ignition protection and water-resistant construction, it is suitable for many locations on gasoline-powered vessels where safety and space economy matter.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this breaker protect my windlass or electric winch?\u003c\/h3\u003e\n\u003cp\u003eThe 285-Series is engineered to act as both the on\/off control and the current-limiting protection for medium-duty loads. If the circuit draws excessive current, the breaker trips and the lever visibly pops, cutting power until the condition is cleared. Unlike a resettable switch that can be forced closed, the Trip-Free design prevents re-engagement until the overload is removed, reducing the chance of wiring damage or motor overheating.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e70 amp rating suitable for many windlasses and winches\u003c\/li\u003e\n  \u003cli\u003eVisible trip lever shows fault status at a glance\u003c\/li\u003e\n  \u003cli\u003eTrip-Free mechanism prevents holding closed during a fault\u003c\/li\u003e\n  \u003cli\u003eResets manually after the fault is corrected\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere can I install this breaker on my boat?\u003c\/h3\u003e\n\u003cp\u003eThis breaker is surface-mountable with face-located terminal studs for straightforward wiring and a compact footprint that saves panel space. It is ignition protected and water resistant, so installation in engine compartments of gasoline-powered boats is permitted where ignition protection is required. Terminal caps shelter connections from accidental contact and reduce the risk of cross-shorts in confined spaces.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSurface-mounted design for bulkhead or panel mounting\u003c\/li\u003e\n  \u003cli\u003eFace-located studs make wiring accessible and neat\u003c\/li\u003e\n  \u003cli\u003eTerminal caps protect against accidental shorts and contact\u003c\/li\u003e\n  \u003cli\u003eIgnition protected for installation near gasoline engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this fit in place of my older 185-series breaker?\u003c\/h3\u003e\n\u003cp\u003eThe 285-Series is designed as a drop-in replacement for the 185-series breakers, matching the same medium-duty application space and installation footprint. That simplifies upgrades or repairs without changing panel cutouts or wiring routing. Confirm stud size and mounting hole alignment against your existing unit to ensure exact compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDrop-in replacement for 185-series models\u003c\/li\u003e\n  \u003cli\u003eSame mounting orientation and terminal layout for straightforward swap-out\u003c\/li\u003e\n  \u003cli\u003eCheck stud thread and torque specs before final installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat durability and support does Blue Sea Systems provide?\u003c\/h3\u003e\n\u003cp\u003eBlue Sea Systems builds marine electrical hardware to withstand wet environments and the vibration common aboard boats. The 285-Series is water resistant and comes with a five-year warranty, reflecting manufacturer confidence and offering long-term support if defects arise. Routine inspection of terminals and seals will keep the unit reliable season after season.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWater-resistant housing suited for marine use\u003c\/li\u003e\n  \u003cli\u003eIgnition-protected construction for gasoline-engine areas\u003c\/li\u003e\n  \u003cli\u003eFive-year manufacturer warranty for peace of mind\u003c\/li\u003e\n  \u003cli\u003eDesigned for easy visual inspection and maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Blue Sea Systems 285-Series 70A surface-mount breaker is aimed at boat owners, marine electricians, and installers who need a compact, reliable switch-plus-protection device for medium-duty loads such as windlasses, electric winches, or similar equipment. It’s ideal when you want a simple swap-in solution for older 185-series breakers, a visible fault indicator, and a Trip-Free safety feature that prevents unsafe re-engagement during a fault.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the 285-Series ignition protected for engine rooms?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 285-Series is ignition protected and suitable for installation in engine rooms of gasoline-powered boats.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I replace a 185-series breaker with this model?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 285-Series is a drop-in replacement for the 185-series, matching mounting and terminal layout.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":55171942154583,"sku":"B005CRV794","price":78.34,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/blue-sea-285-series-front-face.jpg?v=1790449869"}],"url":"https:\/\/britishgarage.co.uk\/collections\/blue-sea-systems.oembed","provider":"British Garage","version":"1.0","type":"link"}