The Blue Sea Systems 285-Series 150A surface mount circuit breaker (Model: 7189-BSS) is a great choice. It can directly replace 185-Series circuit breakers. With a visible reset lever, you can easily see the open condition. It's ignition protected, making it safe for gasoline-powered boats and meeting SAE J1171 external ignition protection requirements. Weather-resistant design ensures long - term use. This unit combines switching and circuit breaker functions in one, but don't use it as a switch for high inrush currents. It's 'Trip Free', meaning it can't be held closed after tripping. Specifications include 150A amperage, 48V DC maximum voltage, surface mounting, a thermally responsive bi - metal blade, 50 in - lb (5.65 Nm) terminal stud torque, 3000A interrupt capacity at 48V, an operating temperature range from - 40°C to 85°C, Type III circuit breaker class, and M6 terminal studs that accept 1/4' ring terminals.
Using the Blue Sea 285 - Series 150A circuit breaker is easy. First, make sure to mount it on a flat surface as it's a surface - mount type. When installing, use the right torque (50 in - lb or 5.65 Nm) for the terminal studs. This breaker can replace 185 - Series ones directly, so you don't need to worry about compatibility. Keep an eye on the visible reset lever. If it shows the open condition, it means the breaker has tripped. Remember, don't use it as a switch when high inrush currents are expected. For maintenance, check the breaker regularly, especially in harsh weather. Since it's weather - resistant, it can handle different conditions, but a visual inspection can help spot any issues early. It's suitable for gasoline - powered boats, but always ensure proper installation to meet safety requirements. This breaker has a wide operating temperature range from - 40°C to 85°C, so it can work well in different climates.
