Blue Sea 5128 175A ANL Fuse

The Blue Sea 5128 175A ANL Fuse is a high-capacity inline fuse designed for serious marine DC electrical systems. At 175 amps, this ANL fuse provides robust main circuit protection for large battery banks found on offshore fishing boats, trawlers, and multi-engine vessels where reliable power distribution is non-negotiable. The silver-plated connector blades resist corrosion in salt-air environments—a critical feature for systems exposed to constant moisture and marine spray.

Built to satisfy American Boat and Yacht Council (ABYC) requirements for main DC circuit protection, this fuse delivers a 6,000 Ampere Interrupt Capacity (AIC), ensuring it safely clears high-fault-current events without nuisance blowing. The visible indication of blown condition allows quick troubleshooting—you can immediately see whether the fuse has failed or if the problem lies elsewhere in the electrical system. Ignition protection conforming to SAE J1171 makes this fuse safe for installation aboard gasoline-powered vessels, eliminating spark risk in fuel-vapor environments. The fuse is designed specifically for use with Blue Sea Systems' ANL Fuse Blocks, ensuring proper fit, electrical contact, and thermal management.

This fuse is essential for anyone running high-demand DC loads—twin alternators, heavy battery chargers, bow thrusters, or large inverters. Weekend anglers with modest electrical systems typically use lower amperage fuses; the 175A rating targets serious fishing operations, liveaboard cruisers, and commercial marine applications where battery bank capacity and DC load demand justify this protection tier. Proper sizing of DC main fuses prevents wire damage and fire hazard while maintaining system reliability in challenging saltwater conditions.