Inline 300 Amp Circuit Breaker

Description

These are quality inline marine circuit breakers suitable for installation on boats, caravans, trucks and under the bonnet of your 4x4 to protect accessories and cables from dead shorts and high loads.

300A Manual Reset Circuit Breaker

These waterproof circuit breakers will detect high amperage draws exceeding 300 amps and will fail open. Users can easily reset them with the toggle of the manual reset lever. These breakers feature a test button which breaks the circuit instantly isolating downstream appliances from the upstream power source. 

Being a true inline breaker these units don't require cable lugs to be fitted and rather simply insert the cable end directly into the breaker and tighten the grub screw to retain it.

These breakers are ideal for protecting cables from loads exceeding 300 amps. The breaker will withstand short peaks over 300 amps but will generally break at the rated setting. The breaker itself is housed inside a quality high temperature plastic housing which helps to reduce the impacts of radiant heat from the surrounding environment altering the trip rating.

These breakers are NOT recommended for use with your 4x4 winch as these are generally expected to draw in excess of 400A. Users should consider a manual isolator switch for their 4x4 winch.

These breakers are suitable for use with the Sherpa Grunter boat trailer winch under certain applications. Again your boat trailer winch is rated to draw up to 400 amps however for many smaller or lighter weight boats you are unlikely to exceed a 300 amp draw. In these scenarios users many benefit from a 300 amp circuit breaker.

Running a breaker, fuse or isolator is especially important with a boat trailer winch as the power cables are run a longer distance from the engine bay battery to the rear of the vehicle. If this cable was to short circuit as a result of rubbing or even in an accident, a fire could be started. A circuit breaker or fuse installed close to the power source (battery) may protect against these scenarios and protect the cable and vehicle. Refer to the user manual and recommendations provided with your boat trailer winch for further information on wiring.