Blue Sea Systems 7139 187 – Series Thermal Circuit Breaker – 50Amp

Blue Sea Systems 7139 187 – Series Thermal Circuit Breaker – 50Amp is a Blue Sea Systems circuit breaker built for branch and main circuit protection. Designed for marine environments, it supports reliable performance, clean installation, and long service life in demanding onboard electrical systems.

187 – Series Thermal Circuit Breakers – Surface Mount 50 Amp Circuit Breaker PN: 7139 Features: Combines switching and circuit protection into a single device All components meet SAE J1171 external ignition protection requirements Clear, single lever operation "Trip Free" design cannot be held "ON" during fault current condition Waterproof Recessed mounting holes for clean appearance Large clearance around terminal studs accept heavy gauge wire lugs Robust 5/16 terminals provide high torque conn

Key specs: Voltage: 48 V DC Amperage: 50 A.

Ideal for builders, refit projects, and serious boat owners who want marine-grade electrical hardware from a trusted brand.