Vacuum Contactor

A vacuum contactor is an electrically operated switching device that uses a vacuum interrupter to make and break AC circuits, primarily designed for frequent load switching in medium-voltage applications. Unlike a circuit breaker, which must interrupt both load currents and fault currents, a vacuum contactor is engineered for high mechanical and electrical endurance—hundreds of thousands […]

The core difference is simple: a vacuum contactors is designed for frequent switching of normal load currents, while a vacuum circuit breaker is designed to interrupt both normal and fault currents under short-circuit conditions.