It is an identical replacement for a damaged or a missing circuit breaker switch that was installed on a new unit. This authentic item is supplied by the original manufacturer for use with Generac portable generators. This circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage ...Read morecaused by overload or short circuit. Its basic function is to detect a fault condition and interrupt current flow. Refer to the appropriate diagrams for your model to ensure the correct repair procedure. Keep in mind this high-quality circuit breaker switch is sold as an individual item.