Blue Sea 5187 200A Fuse Terminal

The Blue Sea 5187 200A Fuse Terminal is purpose-built marine DC circuit protection designed for serious boaters operating large battery banks on vessels with significant electrical loads. Whether you're running a center console, offshore cruiser, or live-aboard sailboat, this fuse terminal protects your battery bank from catastrophic short circuits and electrical fires—a critical safety component that satisfies ABYC (American Boat and Yacht Council) standards for main circuit protection. This is the kind of equipment you install once and trust with your vessel and crew safety.

Built with a 200-amp interrupt rating, the Blue Sea 5187 handles high-current DC systems found on larger boats where battery banks exceed standard fused distribution requirements. The terminal features a clear window design that provides visual indication of fuse status—you can see at a glance whether your main protection is active or blown, critical information when troubleshooting electrical issues underway. Its ignition-protected construction makes it safe for installation on gasoline-powered vessels, eliminating spark hazard concerns in fuel-vapor environments. The compact form factor (3 x 1 x 4 inches) fits cleanly in engine rooms and battery compartments without consuming excessive real estate.

This fuse terminal is essential for captains and boat owners who've invested in high-amperage electrical systems, dual or triple battery banks, or auxiliary power systems for refrigeration, thruster motors, or charging equipment. Professional marine electricians specify Blue Sea systems because they deliver reliability in harsh saltwater environments where electrical failure isn't an option. Installation integrates directly into your main battery positive feed, protecting the entire downstream distribution system. For boats 35 feet and larger, or any vessel with 400+ amp-hour battery capacity, the 5187 provides the main-circuit-level protection your insurance and safety standards demand.