The CAP CER 220PF 500V NP0 1812 is a specific type of ceramic capacitor. It features a capacitance value of 220 picofarads and operates within a voltage range of ±5% at 500 volts. This capacitor belongs to the C0G, or NP0, class, which is known for its stability over temperature. The 4532 metric designation indicates its dimensions in millimeters, with '45' representing the length, '32' signifying the width, and 'M' denoting metric units.