The Blue Sea Systems 187-Series 150A surface-mount circuit breaker is a great choice. It combines switching and circuit protection in one device. With a clear single-lever operation, it's easy to use. The 'Trip Free' design ensures safety during fault currents. It's waterproof, has recessed mounting holes for a clean look, and large clearances around terminal studs to accept heavy gauge wire lugs. The robust 5/16 M8 terminals offer high-torque connections. The large lever with vertical/horizontal orientation shows the trip status. It's ignition protected, suitable for gasoline-powered boats and meets SAE J1171 external ignition protection requirements. Note: Don't use it as a switch for high inrush currents.
Specifications:
- Amperage: 150A
- Maximum Voltage: 48vDC
- Mounting: Surface Mount
- Circuit Breaker Type: Thermally responsive Bi-metal blade
- Terminal Stud Torque: 75 in-lb (8.47 Nm)
- Interrupt Capacity: 5000A @ 12V, 3000A @ 24V, 1500A @ 42V
- Minimum Operating Temperature: -40° C
- Maximum Operating Temperature: 85° C
- Case Material: Thermoset Polyester
- Circuit Breaker Class: Type III - switchable/manual reset - trip free
- Mounting Hole: Accept #10 (M5) Screw
- Terminal Stud Size: 5/16' - 18
Using this Blue Sea circuit breaker is easy. First, mount it on a surface using #10 (M5) screws through the recessed mounting holes for a clean installation. Connect heavy gauge wire lugs to the terminal studs with large clearances. Remember to torque the terminal studs to 75 in-lb (8.47 Nm).
When using, operate the single lever for switching. The lever's vertical/horizontal orientation will show you the trip status. It's important not to use it as a switch when high inrush currents are expected.
As for maintenance, since it's waterproof, it can handle some wet conditions. But check it regularly for any signs of damage or wear. Keep it within the operating temperature range of -40° C to 85° C. If it trips, manually reset it according to the Type III class. This breaker is safe for gasoline-powered boats, thanks to its ignition protection, but always follow proper installation procedures to meet SAE J1171 requirements.
