BOJACK MRBF 200A Marine Battery Fuse Block - 58V DC, IP66 Waterproof, Stainless-Steel Studs

BOJACK MRBF Terminal Fuse Block is a compact, marine-rated 200A battery fuse holder built for high-current DC protection with IP66 waterproofing.

This dual MRBF fuse block combines rugged materials and a space-saving profile to protect main DC circuits on boats, vehicles, inverters and other heavy-duty applications. Constructed from heat-resistant thermoplastic with stainless-steel studs and a clear PES fuse housing, it supports up to 58V DC and accepts a 200A MRBF fuse (one fuse included). The included waterproof insulating cap and durable hardware help reduce environmental and accidental shorting risks while maintaining excellent conductivity.

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

The BOJACK MRBF fuse block isolates and interrupts excessive current to prevent wiring damage and component overloads in DC systems. Its 200A fuse rating and nickel-plated copper alloy fuse element provide fast, reliable circuit interruption for transient and sustained overcurrent events. The ceramic insulation and robust stud construction ensure safe operation under high temperature and vibration conditions.

• 200A MRBF fuse element with nickel-plated copper alloy, 2.5mm thickness
• Thermoplastic PA66 body and ceramic insulation for heat resistance
• Stainless-steel M8 studs and M10 mounting hole for secure connections
• Rated to 58V DC, suitable for marine and vehicle systems

Is this fuse holder waterproof and suitable for marine use?

Yes — the device is built to IP66 protection class, offering strong resistance against dust and powerful water jets, which is essential in marine or exposed outdoor installations. The unit ships with a red waterproof insulating cap that reduces the chance of accidental shorts and helps shield the terminal from spray and contaminants. Materials were selected to resist corrosion and maintain conductivity in humid or salty environments.

• IP66-rated enclosure resists dust and heavy water spray
• Red insulating cap prevents accidental contact and ingress
• Stainless-steel studs reduce corrosion on terminals
• Ceramic insulation minimizes moisture-related performance loss

What are the installation and compatibility details I need to know?

The BOJACK MRBF fuse block mounts easily using the M10 mounting hole and accepts standard 5/16" (M8) stud ring terminals. It ships with the hardware needed for a single-fuse installation (washers, lock washer, hex nut) and one 200A MRBF fuse — choose your amperage at purchase if another rating is required. Because of its compact footprint, it fits tight spaces on inverter banks, bow thruster circuits, motorhomes, and other DC mains.

• Stud size: 5/16" (M8) — compatible with standard ring terminals
• Mounting hole: 3/8" (M10) for secure chassis fastening
• Package includes 1 dual terminal fuse block, insulator cap, hardware, and 1x 200A fuse
• Compact profile fits inverter leads, in-line battery protection, and bow thrusters

How does the BOJACK design deliver reliable conductivity and durability?

The block uses thermoplastic PPS for the main body with stainless-steel studs to combine electrical efficiency and thermal endurance. The fuse element is nickel-plated copper alloy for lower resistance and good current carrying capacity, while ceramic insulation and a clear PES fuse housing resist heat and enable visual inspection. These materials reduce voltage drop and improve long-term stability in demanding environments.

• Thermoplastic and ceramic parts for heat and flame resistance
• Nickel-plated copper alloy fuse for low resistance and durability
• Clear PES fuse housing allows quick visual checks
• Stainless-steel studs prevent corrosion and maintain tight connections

Who is this for: Technicians, boat owners, van lifers and installers who need a compact, marine-capable high-current fuse solution will benefit from the BOJACK MRBF 200A terminal fuse block. It’s ideal for protecting DC mains, inverter inputs, bow thruster circuits, motorhome electrical systems, and similar applications where space is limited but reliable high-current interruption and weather resistance are required.