When the latch element 17 is in engagement with the abutment elements on the plunger 19, it will be 'appreciated that the latch element and the contacts 11 will move as a unit with the plunger as the same moves between its “in” and “out,” or closed and open positions; however, if an overload current condition occurs, so as to' cause the legs of the thermostat element 17 to expand or move outwardly out of engagement with the abutment elements on the plunger 19, the current responsive latch element and contacts 11 will move as a unit relative to the plunger 19 so as to open or disengage contacts 11 and 13.