A ceramic capacitor with the part number CAP CER 12PF 1KV C0G/NP0 1808 has been identified. This component is a 1808 (4520 metric) package size and features a capacitance value of 12 pF, along with a tolerance of ±5%. It also boasts an impressive voltage rating of 1000V (1kV). The capacitor is classified as C0G/NP0, which signifies its stability over temperature.