Description This refrigerator PTC compressor starter and overload protector is designed to ensure the efficient operation of your appliance. Featuring a -shaped design, it combines a thermal protector and relay to safeguard the compressor from overheating and electrical surges, enhancing the longevity and reliability of your refrigerator or freezer. Features -Color:Multi -Material:Plastic,metal -Size:3.30X2.90X2.20cm/1.30X1.14X0.86in(black) -Size:3.20X2.90X2.30cm/1.26X1.14X0.90in(white) -High efficiency start: ensures smooth operation of the refrigerator compressor, extending the lifespan of the equipment -Overload protection design: effectively prevents equipment damage caused by excessive current, enhancing system stability - overheat protection: automatically cuts off power to avoid high temperatures, ensuring household electrical safety -Precise temperature control: maintains a constant internal temperature in the refrigerator, optimizing food preservation -Versatile application: suitable for various household and commercial refrigerators, easy to install and maintain, adaptable to multiple usage scenariosPackage list: 4 x QP1-4.7 Starter Relay 4 x Overload Protector