{"product_id":"bussmann-150a-type-iii-circuit-breaker-ignition-protected-flush-mount-waterproof-1-piece","title":"Bussmann 150A Type III Circuit Breaker — Ignition-Protected Flush-Mount, Waterproof (1 Piece)","description":"\u003cp\u003e\u003cstrong\u003eThe Bussmann Series CB185 150A Type III is a flush-mount, ignition-protected circuit breaker designed to protect high-amperage accessory and charging circuits in trucks, RVs, buses and marine installations.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis genuine Bussmann circuit breaker offers reliable overcurrent protection for multi-battery systems, battery isolators and heavy accessory loads. Built with a sealed, waterproof housing and engineered to meet SAE J1171 ignition-protection requirements, the CB185 is intended for environments where exposure to moisture, vibration and elevated currents is common. It installs flush for a neat panel appearance and provides a durable solution for mobile and marine electrical systems.\u003c\/p\u003e\n\n\u003ch3\u003eWhat kind of systems is the CB185 150A best used with?\u003c\/h3\u003e\n\u003cp\u003eThe CB185 is tailored for high-current accessory circuits and battery-charging applications in vehicles that demand robust protection. It's commonly applied to battery isolators, alternator outputs, inverter feeds and auxiliary power feeds on trucks, RVs, buses and boats. The Type III construction helps ensure consistent operation in mobile environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProtects battery charging circuits and alternator output lines\u003c\/li\u003e\n  \u003cli\u003eUsed with battery isolators in multi-battery setups\u003c\/li\u003e\n  \u003cli\u003eSuitable for heavy accessory loads like winches, inverters and HVAC systems\u003c\/li\u003e\n  \u003cli\u003eCompatible with automotive, RV and marine electrical panels\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the CB185 handle wet or harsh environments?\u003c\/h3\u003e\n\u003cp\u003eThe CB185’s sealed, waterproof housing resists moisture and contaminants that commonly affect vehicle and marine electrical systems. Its flush-mount design reduces exposure to snagging or accidental contact, and the robust construction withstands vibration and road or sea conditions. This makes it a practical choice where durability matters.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWaterproof sealed enclosure protects internal contacts\u003c\/li\u003e\n  \u003cli\u003eFlush mounting minimizes exposure to external hazards\u003c\/li\u003e\n  \u003cli\u003eDurable build tolerates vibration and shock in mobile use\u003c\/li\u003e\n  \u003cli\u003eDesigned for long-term, maintenance-friendly installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDoes the CB185 meet ignition protection and safety standards?\u003c\/h3\u003e\n\u003cp\u003eYes — the CB185 complies with the SAE J1171 standard for ignition protection, which helps reduce the risk of ignition in flammable atmospheres typical of fuel-equipped vehicles and vessels. This compliance makes it suitable for installations where code and manufacturer recommendations require ignition-protected components. Always follow vehicle or vessel wiring diagrams and fuse\/breaker placement guidelines.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMeets SAE J1171 ignition protection requirements\u003c\/li\u003e\n  \u003cli\u003eDesigned to minimize sparking under fault conditions\u003c\/li\u003e\n  \u003cli\u003eAcceptable for fuel-system-adjacent electrical locations\u003c\/li\u003e\n  \u003cli\u003eSupports safer battery and charging system configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install and size the CB185 for my system?\u003c\/h3\u003e\n\u003cp\u003eInstall the CB185 in the panel or location where its flush mount and sealed housing best protect it from direct exposure while keeping wiring runs short to reduce voltage drop. Choose the 150A rating to match or slightly exceed expected continuous load while staying within conductor ampacity and manufacturer recommendations. When in doubt, consult vehicle wiring standards and a qualified technician for proper torque, wire gauge and terminal preparation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSelect conductor gauge rated for 150 amps and environmental conditions\u003c\/li\u003e\n  \u003cli\u003eMount flush to maintain sealing and reduce snag risk\u003c\/li\u003e\n  \u003cli\u003eUse proper terminal crimping and torque values for reliable contact\u003c\/li\u003e\n  \u003cli\u003ePosition near the battery or isolator to limit voltage drop\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Bussmann CB185 150A Type III circuit breaker is aimed at professional installers, fleet technicians and owner-operators who need dependable, ignition-protected overcurrent protection for high-amperage vehicle or marine circuits. It's a good fit when you require a sealed, flush-mount breaker for battery-charging systems, multi-battery isolators, heavy accessory feeds or any application that calls for SAE J1171-compliant components.\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 CB185 suitable for marine use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The CB185’s sealed housing and SAE J1171 compliance make it appropriate for marine battery and accessory circuits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What wire size should I use with a 150A breaker?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use conductors rated for 150A continuous load—typically 1\/0 AWG copper in most installations, but verify with local code and installation conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Bussmann","offers":[{"title":"Default Title","offer_id":55165702275415,"sku":"B001PYK5NC","price":36.28,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/bussmann-cb185-front-panel.jpg?v=1790357333","url":"https:\/\/britishgarage.co.uk\/products\/bussmann-150a-type-iii-circuit-breaker-ignition-protected-flush-mount-waterproof-1-piece","provider":"British Garage","version":"1.0","type":"link"}