BOJACK MRBF 80A Marine Fuse Block – IP66 Waterproof 58V DC Battery Holder

The BOJACK MRBF Terminal Fuse Block is a compact, marine-rated 80A battery fuse holder with IP66 waterproof protection and stainless-steel studs for reliable high-current DC circuit protection up to 58V.

This dual MRBF fuse block is engineered for boats, vehicles, and other DC systems where space is limited but high-current protection is required. Built from heat-resistant thermoplastic and ceramic insulation, with nickel-plated copper alloy fuse blades and stainless-steel hardware, it combines durability, conductivity, and environmental sealing. The included waterproof cap and clear PES fuse housing make it easier to inspect and protect the fuse from moisture and debris.

What electrical limits and materials should I expect from this fuse block?

The BOJACK MRBF is rated for up to 80 amps and a maximum of 58V DC, making it suitable for many marine and automotive 12–48V systems. Key materials focus on heat tolerance and conductivity to keep performance steady under load.

• Rated current: 80A; maximum voltage: 58V DC.
• Body: PA66-RG301 thermoplastic; insulation: ceramic for temperature resistance.
• Fuse blades: copper alloy, nickel plated, 2.5mm thickness for low resistance.
• Studs and nuts: stainless steel; mounting hole: M10 (3/8"); stud size: M8 (5/16").

How does the waterproof cap protect the fuse holder in marine conditions?

The IP66-rated design and supplied waterproof cap guard the fuse and terminal against water jets and heavy dust exposure—common threats in boats and outdoor vehicles. The cap also prevents accidental shorts while helping maintain electrical reliability in harsh environments.

• IP66 protection class resists powerful water jets and dust ingress.
• Red insulating cap reduces short-circuit risk and visualizes polarity.
• Clear PES fuse housing enables quick visual inspection without removal.
• Durable thermoplastic and ceramic materials maintain insulation when wet.

Which applications and installations is this MRBF fuse block best suited for?

Its compact footprint and high current capacity make the fuse block a flexible choice for marine, automotive, and industrial DC systems where space is constrained. Common uses include DC mains, inverters, bow thrusters, hoists, motorhomes, and small commercial vessels.

• Suitable for boats, yachts, and marine systems requiring corrosion resistance.
• Fits DC main feeds, inverter lines, and bow thruster protection circuits.
• Works in new-energy vehicles, motorhomes, cranes, and industrial equipment.
• Compact design allows mounting where space is limited—secure with M10 mounting hole.

What comes in the package and are there installation tips I should know?

The kit ships with the dual MRBF terminal fuse box and the essential mounting and protection hardware so you can install it quickly. Select the correct amperage before purchase; each unit includes one MRBF fuse at the ordered rating.

• Package: 1 dual MRBF terminal fuse box, 1 red insulating cap, 1 washer, 1 lock washer, 1 hex nut, and 1 × 80A fuse.
• Pre-drill a secure M10 mounting point and torque stainless fasteners to recommended spec.
• Ensure correct fuse amperage selection; confirm polarity and secure connections to reduce heating.
• Keep the waterproof cap seated after wiring to preserve IP66 protection.

Who is this for: The BOJACK MRBF 80A Terminal Fuse Block is designed for boat owners, marine electricians, RV and vehicle customizers, and industrial technicians who need dependable high-current DC protection in compact spaces. It suits anyone seeking corrosion-resistant hardware, clear fuse visibility, and a waterproof solution for 12–48V systems where reliability matters.