Blue Sea 7445 UL-489 Circuit Breaker - 50A Flat Rocker

The Blue Sea 7445 UL-489 Circuit Breaker - 50A Flat Rocker is a marine-grade electrical protection device engineered for vessels operating under federal maritime regulations. Built to UL-489 specifications, this 50-ampere DC circuit breaker is the standard for Navy, Army, Coast Guard vessels, and all commercial/private craft subject to CFR 46 compliance. The flat rocker actuator design provides positive mechanical indication of breaker status, critical for electrical system diagnostics in marine environments where reliability directly impacts safety and mission continuity.

Rated for 50A DC at maximum 80V, this single-pole magnetic hydraulic circuit breaker delivers trip-free operation—meaning the breaker cannot be held in the ON position if an overload occurs. The #10-32 screw terminal connections use tin-plated brass, standard for marine applications where corrosion resistance is essential in saltwater and high-humidity environments. The magnetic hydraulic design responds to both instantaneous short circuits and sustained overcurrent conditions, protecting vessel wiring and equipment from thermal damage. Compact dimensions (3 x 2 x 5 inches) and lightweight construction (0.25 lbs) enable easy panel integration in space-constrained marine electrical systems.

This breaker is designed for deck operations, navigation systems, propulsion circuits, and auxiliary power distribution aboard vessels of all sizes. It serves retrofit applications where UL-489 compliance is mandatory for insurance, inspection, or regulatory certification. Operators and marine electricians specify this model for mission-critical DC systems where electrical redundancy and code compliance are non-negotiable. The flat rocker format is compatible with standard marine panel cutouts and allows glove operation in adverse weather conditions.

Blue Sea Systems is the recognized authority in marine electrical protection, with products specified by the U.S. Navy and adopted across commercial shipping. The 7445 UL-489 Circuit Breaker carries the credibility and field-proven performance associated with the Blue Sea brand, backed by decades of deployment in the most demanding maritime environments.