Blue Sea Systems' 285-Series 30A panel-mount circuit breaker, model 7081-BSS, is a great upgrade. It can directly replace 185-Series circuit breakers. The visible reset lever clearly shows the open condition. It's ignition protected, making it safe for gasoline-powered boats and meeting SAE J1171 external ignition protection requirements. It's weather-resistant too. This breaker combines switching and circuit breaker functions in one unit (but don't use it as a switch for high inrush currents). It's 'trip free', so it can't be held closed after tripping. Specifications: 30A amperage, 48V DC max voltage, surface mount, thermally responsive bi-metal blade, 60 in-lb (6.78 Nm) terminal stud torque, 3000A interrupt capacity at 48V, -40°C min operating temperature, 85°C max operating temperature, Type III circuit breaker class (switchable/manual reset - trip free), and M6 terminal stud (accepts 1/4' ring terminal).
Using this Blue Sea 285-Series circuit breaker is easy. First, make sure your electrical system's voltage and amperage match the breaker's specifications. Then, surface-mount it in a suitable location. Connect the wires to the M6 terminal studs, tightening them to 60 in-lb (6.78 Nm) of torque. When the breaker trips, the visible reset lever will show the open condition. Simply reset it by moving the lever. Note that you shouldn't use this breaker as a switch where high inrush currents are expected. To maintain it, keep it in a dry environment as it's weather-resistant but still sensitive to extreme moisture. Check the breaker regularly for any signs of damage or wear. If it has been tripped multiple times, consider replacing it to ensure reliable performance. The breaker can operate between -40°C and 85°C, so avoid exposing it to temperatures outside this range.
