The CAP CER 120PF 3KV C0G/NP0 1808 is a type of ceramic capacitor. It has a capacitance value of 120 pF and operates within the range of ±10%. The capacitor is rated for a maximum working voltage of 3000V, or 3kV. This component is classified as a COG (NP0) type, with a designation of 1B. Its metric designation is 4520, while its US designation is 1808.