BOJACK MRBF Terminal Fuse Block 150A IP66 Waterproof — Marine-rated 58V DC Protection

BOJACK MRBF Terminal Fuse Block is a compact, marine-rated 150A battery fuse holder that protects high-current 58V DC circuits while resisting water and dust. This dual MRBF fuse block combines a small footprint with robust materials to protect DC main feeds on boats, vehicles, inverters and industrial equipment. Its thermoplastic body, stainless-steel studs, and ceramic insulation deliver durable electrical performance, while the included waterproof cap reduces short-circuit risk and environmental degradation. The unit ships with a 150A MRBF fuse and hardware for terminal mounting so it’s ready to install in tight spaces.

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

The MRBF fuse interrupts excessive current flow to prevent wire overheating and component damage in 58V DC systems. Its 150A rating suits heavy loads and transient ignition currents, providing dependable protection for main battery feeds and inverter inputs.

• 150A MRBF fuse element for high current interruption
• Copper alloy, nickel-plated fusible link for consistent conductivity
• Ceramic insulation to withstand heat and electrical stress
• Stainless-steel studs for secure, corrosion-resistant connections

Will it withstand marine and outdoor environments?

Yes — the package is built to resist moisture and contaminants with an IP66 protection rating and a waterproof cap. The thermoplastic body and nickel-plated components minimize corrosion, making the fuse block suitable for exposed or damp installations.

• IP66-rated housing for dust-tight and powerful water resistance
• Waterproof red insulating cap reduces accidental shorts
• PA66-RG301 thermoplastic body resists chemicals and UV exposure
• Stainless-steel hardware prevents rust in marine conditions

How easy is it to install and what dimensions/terminals are used?

Installation is straightforward: secure the block with the M10 mounting hole and connect battery or cable lugs to the M8 studs. The compact footprint and included hardware let you retrofit existing setups or fit the block where space is limited.

• Stud size: 5/16" (M8) — compatible with common lug sizes
• Mounting hole: 3/8" (M10) for secure terminal attachment
• Supplied parts: washer, lock washer, hex nut, and one 150A MRBF fuse
• Clear PES fuse housing for quick visual inspection of the element

What materials ensure electrical performance and longevity?

The fuse block combines heat-resistant polymers and corrosion-proof metals to maintain conductivity and mechanical strength over time. These materials help the holder tolerate heavy currents, high temperatures, and marine exposure without premature failure.

• Body: PA66-RG301 thermoplastic for mechanical stability
• Studs/nuts: stainless steel for conductivity and corrosion resistance
• Fuse element: copper alloy with nickel plating for low resistance
• Insulation: ceramic components and clear PES fuse housing

Who is this for This BOJACK MRBF 150A terminal fuse block is for boat owners, RV and motorhome builders, electric-vehicle retrofitters, inverter and battery pack installers, and industrial technicians who need reliable, compact overcurrent protection in wet or confined environments. Choose this unit when you require a marine-rated, high-current fuse holder with simple mounting, corrosion-resistant hardware, and a waterproof safety cap for long-term service.

FAQ

Q: Is the BOJACK MRBF fuse block waterproof?

A: Yes. The fuse block has an IP66 rating and includes a waterproof cap to resist water and dust ingress.

Q: What cable lug and mounting sizes are required?

A: Use 5/16" (M8) lug terminals for the studs and a 3/8" (M10) hole to secure the mounting fastener.