Abstract: An enclosed motor protector has a housing formed by a base (10) and a cover (12) received on the base and enclosing a recess (10a) formed in the base. A first terminal (14) extends through an opening in the housing and mounts a stationary contact (14c) within the recess. An elongated movable contact arm (18) is cantilever mounted at one end in the recess and mounts a second movable contact (18a) on a free end of the arm which is adapted to move into and out of engagement with the stationary contact. A heater (20) is mounted in the recess in heat transfer relation with a snap acting thermostatic disc (22) disposed adjacent to the movable contact arm so that upon reaching a preselected temperature the disc will snap from one dished configuration to an opposite dished configuration with its motion transferred to the movable contact arm to move the contacts out of engagement.