The circuit breaker is used as a protection switch for power supplying a circuit with AC 50Hz or 60Hz, voltage 220V, current up to 32A. It has inherent overload protection function. Combined with a fuse, it can also provide short circuit protection for a circuit. Besides, it can unfrequently make and break a loaded circuit. It is especially suitable for lighting devices in houses and public places, or a single electric appliance such as refrigerator etc.