The part number CAP CER 220PF 1KV C0G/NP0 1812 corresponds to a specific type of ceramic capacitor. It is characterized by its capacitance value of 220 pF and a tolerance of ±10%. This component has an operating voltage rating of 1000V (1kV) and belongs to the C0G or NP0 class, which are known for their stability across temperature changes. The 1812 designation refers to its metric package size, while the part number also includes the prefix CAP CER, indicating it is a ceramic capacitor.