This is a run capacitor. It is 220 VAC (volts alternating current) and is used in conjunction with your freezer. This part helps the compressor kick on and off while maintaining a constant temperature to keep things frozen in your freezer. It does this by sending constant electric currents to the motor windings, this will create a magneti...Read morec field that allows the motor to keep running. This part measures to be almost 1.5 inches tall, 2.5 inches wide, and 3/4 of an inch thick. It is black color and 15 mfd (microfarad).
This part is both the start relay and the overload. The start relay boosts the compressor, and then shuts off as soon as the motor gets up to speed and the overload provides extra protection against excessive temperatures.