Blue Sea 7457 UL-489 Circuit Breaker - 20A Flat Rocker

The Blue Sea 7457 UL-489 Circuit Breaker – 20A Flat Rocker is a magnetic hydraulic trip-free breaker engineered to meet strict UL-489 specifications required for Naval, Army, and Coast Guard vessel electrical systems. This 20-ampere unit handles AC loads up to 240 volts and features a flat rocker actuator for reliable manual operation in demanding marine and offshore environments where regulatory compliance is non-negotiable.

With a single-pole configuration and #10-32 screw tin-plated brass terminals, this breaker integrates seamlessly into 240V AC electrical distribution systems. The magnetic hydraulic mechanism delivers instantaneous protection against short circuits while the trip-free design ensures the breaker cannot be held in the ON position during a fault condition—a critical safety feature in systems governed by CFR 46 (Code of Federal Regulations Title 46). The compact 3 x 2 x 4 inch form factor accommodates space-constrained panel installations without sacrificing performance or accessibility.

This breaker is specified for vessels and electrical systems where UL-489 compliance is mandatory—including military vessels, Coast Guard cutters, commercial offshore platforms, and any CFR 46-regulated marine installation. Operators and marine electricians rely on the 7457's proven performance and regulatory pedigree to maintain system integrity and crew safety in salt-air and high-vibration environments where standard industrial breakers fall short of certification requirements.

Blue Sea Systems has built its reputation by manufacturing circuit protection specifically for marine and harsh-duty applications. The UL-489 designation—earned through rigorous third-party testing—guarantees that this breaker meets the electrical and mechanical standards demanded by government vessels and regulated commercial maritime operations.