Abstract: A switch including two contact plates spaced in a housing, a bimetallic strip and a stop plate respectively connected to one contact plate, a T-shaped switch handle, a control block mounted around the switch handle, a conductive connecting plate fastened to a neck portion on the switch handle, a cushion mounted around the switch handle a first spring retained between the conductive connecting plate and the cushion, and a second spring supported between the control block and the head of the switch handle, wherein when the switch handle is turned sideways against the stop plate spring, the conductive connecting plate is forced to contact the first and second contact plates, causing the switch switched on; the bimetallic strip is deformed to force the stop plate spring away from switch handle, when the switch is overloaded, causing the switch to trip off.