BOJACK MRBF 250A Marine Fuse Block 58V DC Waterproof IP66, Dual-Terminal Compact Holder

BOJACK MRBF Terminal Fuse Block is a compact, marine-rated 250A fuse holder designed to protect high-current 58V DC battery circuits while resisting water and dust.

This dual terminal MRBF fuse block combines heavy-duty conductivity with a weatherproof housing so you can install reliable overcurrent protection in cramped compartments on boats, vehicles, or industrial equipment. Built from thermoplastic and stainless steel with a clear PES fuse housing, it balances corrosion resistance, high-temperature performance, and convenient serviceability. The unit ships with a waterproof insulating cap and one 250A fuse; select other amperages separately if needed.

How does this fuse block protect my boat or vehicle electrical system?

The MRBF terminal fuse interrupts excessive current to prevent wiring and equipment damage during faults. Its ceramic insulation and nickel-plated copper alloy fuse element handle high ignition transients and sustained loads, while stainless studs maintain low resistance connections.

• Rated for up to 58V DC and 250A continuous current
• Ceramic insulation reduces thermal stress and increases dielectric strength
• Nickel-plated copper alloy fuse element for reliable conductivity
• Stainless steel studs and nuts resist corrosion in marine environments

Is the fuse block really waterproof enough for marine use?

Yes—the enclosure meets IP66 protection, which means it is dust-tight and protected against powerful water jets. The supplied waterproof red cap covers the live stud to prevent accidental shorts and reduces environmental exposure when installed on deck or in bilge areas.

• IP66-rated housing keeps dust and high-pressure water out
• Red insulating cap provides additional short-circuit protection
• Thermoplastic body and PES fuse housing resist moisture absorption
• Stainless hardware prevents rust from saltwater exposure

How does the compact design fit into limited spaces like inverter bays?

The MRBF terminal fuse block is engineered for tight installations where full-sized holders won’t fit. Its dual terminal layout and low-profile body let you mount close to batteries, in inverter compartments, or on bulkheads without sacrificing access for service and replacement.

• Compact footprint for inverter, bow thruster, and hoist installations
• Mounting hole sized for M10 (3/8") fasteners; stud size M8 (5/16")
• Low-profile design simplifies connection routing and panel integration
• Includes washer, lock washer, and hex nut for secure mounting

What materials and parts are included with the kit?

The kit combines durable thermoplastic, ceramic insulation, and corrosion-resistant metal hardware to give long-lasting performance in harsh conditions. One 250A MRBF fuse is included; other amperages must be chosen separately at purchase.

• Body: PA66-RG301 thermoplastic; fuse housing: clear PES plastic
• Fuse element: 2.5mm nickel-plated copper alloy, silver color
• Studs and nuts: stainless steel for high-temperature conductivity
• Package contents: dual terminal fuse block, red cap, washer, lock washer, hex nut, 250A fuse

Who is this for? Owners and technicians who need dependable high-current protection in compact or wet environments will find the BOJACK MRBF Terminal Fuse Block useful. It’s suited to small boats, yachts, motorhomes, inverters, cranes, and other DC systems where space is limited and corrosion resistance matters. Choose this unit when you want a rugged, easy-to-service fuse holder with IP66 protection and stainless hardware for long-term reliability.