Eaton Bussmann MRBF-400 Marine Rated Battery Fuse, 400A 32V DC, Ignition Protected High-Current - Pack of 5

MRBF Series Marine Rated Battery Fuse - Eaton Bussmann Series

The Eaton Bussmann MRBF-400 represents the high-capacity threshold of the Marine Rated Battery Fuse series, providing robust circuit protection for the most demanding DC power systems. This fuse is specifically engineered to protect high-output alternator circuits, large motor loads, and massive battery banks. Its space-efficient design allows it to be mounted directly to a battery terminal or heavy-duty busbar, effectively reducing the footprint required for high-current protection. Rated for ignition protection under SAE J1171, the MRBF-400 is ideal for use in enclosed engine compartments where safety and reliability are non-negotiable.

Technical Specifications:

• Manufacturer: Eaton
• Brand: Bussmann series
• Catalog Number: MRBF-400
• Fuse Type: Marine Rated Battery Fuse (MRBF)
• Rated Current: 400 A
• Rated Voltage: 32V DC
• Interrupting Rating: 5,000A @ 32V DC / 10,000A @ 14V DC
• Ignition Protection: SAE J1171
• Ingress Protection: IP66

Physical Characteristics:

• Mounting Interface: Compatible with M8 (5/16") studs
• Housing: High-temperature, transparent thermoplastic for visual terminal inspection
• Material: Tin-plated copper alloy terminals for maximum conductivity and oxidation resistance
• Design: Compact single-pole, direct-mount architecture

Application: The MRBF-400 is the premier choice for primary circuit protection in large-scale marine vessels, expedition RVs, and industrial mobile power units. It is specifically designed for high-load equipment such as high-output inverters (3000W+), heavy-duty bow thrusters, windlasses, and as the main fuse for large lithium or AGM battery banks.