Mz6 Type PTC Thermistor is widely used for over temperature protection on the main parts inside the electric motor. For example, the PTC thermistor is embedded into the three-phase electric motor stator winding. When the temperature of stator winding of electric motor is up to the insulation grade temperature of insulated material, the resistance of PTC thermistor will rise at the same time. And the signal is transmitted to the protector to switch off the current of electric motor and finally prevent the electric motor from being burned out.