BOJACK MRBF 100A Marine Battery Fuse Block - IP66 Waterproof, Stainless-Steel Studs

This dual terminal fuse block is engineered for demanding DC installations where space is limited and exposure to water, dust, or vibration is likely. It combines a clear PES fuse housing, ceramic insulation, and a thermoplastic PA66 base to deliver secure electrical connections for boats, vehicles, inverters, and other high-current systems. A removable waterproof cap and nickel-plated copper alloy fuse ensure consistent performance and easy visual inspection.

How does this fuse block protect high-current DC systems?

The BOJACK MRBF blocks currents above 100 amps using a replaceable MRBF cartridge that opens under overload conditions, preventing wiring and component damage. Its ceramic insulation and stainless-steel studs keep the electrical path stable at elevated temperatures and currents.

• 100A fuse rating with nickel-plated copper alloy element for low resistance
• Ceramic insulation resists heat and electrical breakdown
• Stainless-steel stud (M8) and nut hardware for strong connections
• Fuse housing made from clear PES for quick visual checks

Is the BOJACK MRBF suitable for marine and outdoor installations?

Yes — the assembly is IP66-rated, meaning it resists powerful water jets and dust ingress, a key requirement for marine and exposed vehicle use. The included waterproof insulating cap prevents accidental shorts and reduces corrosion at the fuse tip.

• IP66 protection class against water and dust exposure
• Waterproof red insulating cap for the live terminal
• PPS/PA66 thermoplastic body designed for harsh environments
• Stainless-steel hardware reduces rust in saltwater settings

How does the MRBF block fit into tight or mobile electrical setups?

The unit’s compact footprint and straightforward mounting options make it easy to install where space is at a premium — such as on inverter panels, boat bulkheads, or inside engine rooms. A standard M10 mounting hole accommodates secure fastening while keeping the assembly low-profile.

• Compact dimensions suitable for small panels and cabinets
• Mounting hole: M10 (3/8") for firm attachment
• Stud size M8 (5/16") compatible with common battery cables
• Simple hardware included: washer, lock washer, hex nut

What materials and components ensure long-term reliability?

Materials were selected to balance electrical performance and durability. Thermoplastic body and ceramic insulation keep heat and arcing under control while the nickel-plated copper alloy fuse and stainless studs maintain conductivity and corrosion resistance over time.

• Body: PA66-RG301 thermoplastic for mechanical strength
• Fuse material: nickel-plated copper alloy, 2.5mm thickness
• Studs and fasteners: stainless steel for corrosion resistance
• Clear PES fuse housing for visual condition monitoring

Who is this for? Installers, boat owners, electricians, and vehicle system integrators who need a compact, marine-grade means to protect DC circuits up to 58V and 100A will find the BOJACK MRBF terminal fuse block useful. It’s well suited for small craft, motorhomes, inverters, bow thrusters, cranes, and other applications where dependable, space-saving overcurrent protection and environmental sealing are important.