Thermal overload protector Available for switching temperatures between 70 deg c to 160 deg c The top is connected in series with single phase motors, transformers Whenever the switching temperature is acheived, the top opens and the motor/transformer is protected The top resets automatically after the temperature comes down sufficiently. Useful for single phase motors, pumps, transformers, UPS, electronic assemblies Weight is approximately 10 gms Diameter: 10 mm