Blue Sea 5131 250A ANL Fuse

The Blue Sea 5131 250A ANL Fuse is the backbone of reliable electrical protection aboard any gasoline-powered vessel. After years on the water, serious anglers and boaters know that a single electrical fault can disable fish finders, navigation systems, and engine instrumentation—or worse, create a fire hazard. This 250-amp inline fuse delivers the dependable circuit protection that marine systems demand, engineered specifically to meet the ignition-safety standards (SAE J1171) required for fuel-injected engines and gasoline tanks.

Built with silver-plated connector blades, the Blue Sea 5131 resists corrosion—a critical feature in saltwater and brackish environments where oxidation can compromise electrical continuity. The fuse offers a 6,000 ampere interrupt capacity, providing robust fault clearance for high-demand circuits common in modern boats. Most importantly, its visible indication feature lets you spot a blown condition at a glance, eliminating the guesswork when troubleshooting electrical issues. The compact ANL form factor (3 x 1 x 5 inches) fits standard fuse holders and distribution panels without requiring rewiring or modifications.

If you operate a center console, cruiser, or fishing boat with modern DC systems—especially those with integrated GPS, sonar, or auxiliary battery banks—the Blue Sea 5131 is an essential spare and a recommended upgrade for aging installations. It pairs seamlessly with Blue Sea Systems distribution panels and fused battery switches, making it a go-to choice for captains who demand OEM-grade reliability. Keep extras aboard; a blown fuse costs nothing compared to a dead fish finder at sunrise.