Breaker

The utility model relates to a breaker and solves a problem that whether a breaker is automatically tripped or is artificially closed can not be determined timely. The breaker comprises a breaker body, a switch and a warning sign, wherein the breaker body is provided with a fixing groove for displacement of the switch, the switch comprises a turning shaft and a handle arranged on the turning shaft, the turning shaft is mounted in the fixing groove, the turning shaft is provided with a cover capable of moving on the turning shaft, the cover is equal to the handle in size and is arranged above the handle, an outer surface between the cover and the handle is provided with the warning sign having a light emitting module, and the light emitting module comprises a substrate provided with multiple LED chips and a power supply module used for supplying power for the light emitting module. The breaker employs the warning sign having the light emitting module, and the cover in matching with the switch handle, so whether the breaker is automatically tripped or is artificially closed can be distinguished rapidly in the dark.