Abstract: A PTC thermistor switch for electric motors includes an insulating casing and a PTC thermistor housed in a housing seat made in the insulating casing. The PTC thermistor has a first face and a second face opposite the first face. A first electric terminal is housed in the insulating casing and has two protrusions in direct contact with the first face of the PTC thermistor in two opposite contact points with respect to the center of the first face. The switch also includes a second electric terminal housed in the insulating casing and an elastic arm portion in direct contact with the second face of the PTC thermistor in an intermediate contact point between the contact points of the protrusions. The second electric terminal is arranged so that the elastic arm portion presses against the second face of the PTC thermistor.

Abstract: A PTC thermistor switch for electric motors includes an insulating casing and a PTC thermistor housed in a housing seat made in the insulating casing. The PTC thermistor has a first face and a second face opposite the first face. A first electric terminal is housed in the insulating casing and has two protrusions in direct contact with the first face of the PTC thermistor in two opposite contact points with respect to the center of the first face. The switch also includes a second electric terminal housed in the insulating casing and an elastic arm portion in direct contact with the second face of the PTC thermistor in an intermediate contact point between the contact points of the protrusions. The second electric terminal is arranged so that the elastic arm portion presses against the second face of the PTC thermistor.

Abstract: A protection device is provided for electric appliances suitable for selectively connecting an electric appliance to a power supply line. The protection device includes a metal plate member, a composite metal blade, an insulating block for supporting the metal plate member and the composite metal blade, and a compensating resistor made en bloc with the metal plate member.

Abstract: The present invention refers to a protection device for electrical appliances comprising: a metal plate member having, at a first end, a stationary electrical contact and at a second end a first electric connection terminal; a composite metal blade having at a first end a movable electrical contact and at a second end a second electric connection terminal, the movable electrical contact making with the stationary electrical contact an electric switch, the composite metal blade being configured for snapping from the closing position to the opening position when the temperature around the composite metal blade exceeds a higher temperature threshold value, and for snapping from the opening position to the closing position when the temperature around the composite metal blade falls below a lower temperature threshold value; an insulating block for supporting the metal plate member and the composite metal blade; the protection device being characterised in that it comprises a compensating resistor made en bloc wit

Abstract: A motor protector having a thermostat metal element thermally coupled to an electrical motor in a refrigerator compressor motor system has a heater responsive to motor current thermally coupled to the thermostat metal element and has an improved component arrangement to provide locked rotor and ultimate trip protection for the motor without requiring calibration of the operating temperature for the protector after assembly or after incorporation in the motor system.