Circuit breaker series 187 - Panel mount 50 A

The Blue Sea 187 series 50 A circuit breaker is designed to protect marine DC electrical circuits from overcurrent. It functions as a safety switch that automatically trips in case of overload or short circuit, cutting power to prevent damage to equipment or wiring.

Unlike a traditional fuse that must be replaced after tripping, the 187 series circuit breaker allows simple and quick manual resetting. This eliminates the need to carry spare fuses and makes restoring the circuit easier after resolving an overcurrent issue.

Yes, this circuit breaker is specifically designed for marine applications. It is robust and offers better resistance to vibrations compared to standard fuses, ensuring increased reliability in nautical environments.

This circuit breaker uses a purely thermal tripping mechanism. It responds to overcurrents based on circuit heating, making it reliable for general circuit protection.

Yes, the 187 series circuit breaker can be used as the main switch for specific equipment. Its manual reset mechanism allows it to be turned on or off manually, in addition to its automatic overcurrent protection function.

The Blue Sea 187 series circuit breaker is designed to operate across a wide temperature range from -40°C to +85°C. This ensures reliability in various marine weather conditions.

Yes, this circuit breaker is flame-resistant according to SAE J1171. This feature is essential for safety in boat engine compartments where flammable vapors may be present.

Thermal circuit breakers, such as the 187 series, are generally more compact and more economical. They are suited for applications where ultra-fast tripping speed is not the top priority, but where reliability and compactness are essential for panel mounting.

This circuit breaker is designed for panel mounting. This means it is installed in a cutout made in an electrical panel or mounting surface, with the breaker's front face flush with the surface.

For installation, you will typically need a hole saw or a drill with a suitable bit to cut the panel opening, a screwdriver to secure the circuit breaker and connect the cables to the terminals, as well as a wrench to tighten the terminal nuts.

Generally, the circuit breaker is supplied with the nuts and washers required for the terminals, as well as a gasket for panel mounting. The hardware to secure the circuit breaker to the panel (screws) may need to be purchased separately, depending on your installation requirements.

This circuit breaker is designed for direct current (DC) systems and can support a maximum voltage of 48V DC. It is therefore compatible with the 12V, 24V, and 48V systems commonly used in marine applications.

This 50 A circuit breaker is ideal for protecting circuits powering high-consumption equipment such as windlasses, voltage converters, medium-sized battery charging systems, or as the main circuit protection for moderate to high-power electrical installations.

No, the Blue Sea 187 series circuit breaker is specifically designed for DC (direct current) systems. It must not be used for protecting AC (alternating current) circuits, as its tripping and breaking characteristics are not suited for this type of current.