Blue Sea Systems 187-Series 50A Thermal Circuit Breaker (Surface Mount)

The Blue Sea Systems 187-Series Thermal Circuit Breaker is a 50-amp surface-mount device that combines switching and circuit protection into a single, waterproof unit. Engineered for durability, this Type III breaker features a trip-free design that cannot be held in the ON position during a fault condition, providing reliable safety for marine electrical systems.

• Switching & Protection: Manual reset with clear single-lever operation.
• Safety: Ignition protected (SAE J1171) for safe installation aboard gasoline-powered vessels.
• Status Indication: Large lever can be oriented vertically or horizontally to indicate trip status.
• Terminal Specs: Equipped with robust 5/16 in. terminals designed to accept heavy gauge wire lugs.
• Voltage Rating: 48V DC maximum.
• Interrupt Ratings: 5,000A at 12V DC, 3,000A at 24V DC, and 1,500A at 42V DC.
• Operating Range: -25°C to +82°C.
• Construction: Features a thermoset polyester case and recessed mounting holes.

Regulatory note: This product contains chemicals, including di(2-ethylhexyl)phthalate (DEHP), known to the State of California to cause cancer, birth defects, or other reproductive harm.