Blue Sea Systems 187 Series DC Circuit Breaker Surface Mount

The Blue Sea Systems 187 Series DC Circuit Breaker is a surface mount thermal circuit breaker. It gives heavy-duty circuit protection where you also need a switch. It is built for marine and other harsh-environment 12V and 24V DC electrical systems. It works as a manual reset breaker and an on/off switch for battery, charging, and high-current accessory circuits.

Key Features:

• Combines switching and circuit protection in one device
• Clear single-lever operation. The large lever shows trip status by its vertical or horizontal position.
• Trip-free design. The breaker cannot be held on during a fault current condition.
• Waterproof construction for marine use
• Ignition protected to SAE J1171, so it is safe to install aboard gasoline-powered boats
• Robust 5/16 inch (M8) terminal studs for high-torque connections. Large clearance around the studs accepts heavy-gauge wire lugs.
• Recessed mounting holes for a clean appearance
• Thermally responsive bi-metal blade design
• Maximum voltage rating of 48V DC
• Terminal stud torque of 75 in-lb (8.47 Nm)

Surface mount breakers screw directly to a flat surface such as a bulkhead, with the wire connections at the front. Do not use the breaker as a switch where high inrush currents are expected. Select the amperage rating that suits your circuit.