Blue Sea Systems 7139-BSS 187 Series Surface Mount DC Circuit Breaker 50 Amp

The Blue Sea Systems 7139-BSS is a 50-amp thermal DC circuit breaker from the 187 Series, designed for reliable overcurrent protection in marine, RV, and automotive electrical systems. This surface-mount circuit breaker is rated for 48 volts DC and features a trip-free design that protects against overloads and short circuits.

Key Features:

• 50 amp current rating at 48 volts DC maximum
• Surface mount design for easy panel installation
• Thermal trip mechanism for accurate, temperature-compensated protection
• 5/16 inch-18 threaded stud terminals for secure wire connections
• Manual reset with ON/OFF switch functionality
• Single pole configuration
• Trip-free design prevents holding breaker closed during fault conditions
• Ignition protected for marine applications

Blue Sea Systems circuit breakers are built to withstand harsh marine environments with corrosion-resistant construction and UL 1077 recognized components. The switchable design allows the breaker to function as both a circuit protector and manual disconnect switch, eliminating the need for a separate switch in many applications.