Perfect spare part for refrigerator, easy to install. Working principle: When the motor starts, it must overcome its own inertia and the reaction force of the load. Therefore, the motor requires higher current and torque during startup. Once running normally, the required torque is significantly reduced to save energy. A set of auxiliary coils is added to the motor, which operates only during startup and disconnects once the motor reaches normal operation. The PTC thermistor is connected in series with the starting auxiliary coil. After the motor starts, the PTC thermistor transitions into a high resistance state, effectively disconnecting the auxiliary coil and achieving the desired effect. Product name: PTC starting relay Resistance: 12, 15, 22 ohm Total size: 3.2 x 2.1 x 2.9 cm / 1.3 x 0.8 x 1.1 inch (length x width x height) Color: Black Material: Plastic Package Contents: 9 x PTC (12, 15, 22 ohm, 2, 3, 4 pins each) Only the above package content; other products are not included. Note: Light and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement allowed error is +/- 1-3 cm.