Blue Sea Systems 187 & 285-Series Thermal Circuit Breakers

The Blue Sea Systems 187 and 285-Series thermal circuit breaker family delivers reliable switching and circuit protection for marine and automotive DC systems. Common features across the series include thermally responsive bi-metal blade operation, trip-free manual reset, and thermoset polyester cases. Many models are waterproof (IP66/IP67 noted in variants), ignition-protected and meet SAE J1171 external ignition protection requirements. Installation-friendly design elements found in the variants include recessed mounting holes, self-trimming cases, round cases for standard hole-saw installation, and a large lever with vertical/horizontal orientation for trip indication; the 285-Series models feature a visible reset lever. Terminal configurations vary by model (robust 5/16"-18 studs for heavy-gauge lugs or 1/4" ring terminals) and interrupt ratings in the family include values up to 5,000A @ 12V and 3,000A @ 24V (model dependent). Typical maximum voltage rating across variants is 48V DC and common operating temperature ranges are shown as -25°C to +82°C.

• 25A DC Panel Mount circuit breaker combines switching and circuit protection into a single device
• "Trip Free" design cannot be held "ON" during fault current condition
• Rated IP66 Waterproof
• Terminal Size: 5/16"-18
• Max voltage: 48V DC, Interrupt capacity: 5000A @12V, 3000A @ 24V, 1500A @ 42V