Blue Sea 5119 300AMP Class T Fuse

The Blue Sea 5119 300AMP Class T Fuse is the marine-grade electrical protection every serious boater and angler needs in their main distribution panel. Whether you're running a cabin cruiser, center console, or offshore sport fishing vessel, this fuse provides the critical short-circuit protection that keeps your electrical system safe during unexpected power surges or equipment faults. Built to Blue Sea Systems' legendary standards, it's the go-to choice for vessel owners who demand reliability when miles from shore.

This Class T fuse delivers an extremely fast short-circuit response with a 20,000 Ampere Interrupt Capacity (AIC), meaning it clears dangerous electrical faults in milliseconds before they damage wiring, batteries, or sensitive electronics. UL listed to standard 248-15 and DC tested to UL standard 198L, it meets the rigorous marine certification requirements that protect both vessel and crew. The 300-amp rating handles high-load systems common on modern fishing boats and cruisers, where multiple pumps, thruster motors, and navigation systems draw heavy current simultaneously. Its compact design fits seamlessly into standard marine fuse blocks without modification.

Anglers and cruising boaters installing or upgrading their DC electrical systems will recognize this fuse as essential hardware for systems rated at 300 amps or below. It's the industry standard for main bus protection in fishing vessels, trawlers, and extended-range cruisers where electrical redundancy isn't an option. Installation is straightforward—simply place it in your Class T fuse block alongside other Blue Sea Systems components for a complete, code-compliant distribution system. Proper sizing and installation protect everything downstream, from battery banks to thruster motors to fish-finder networks.