The CAP CER 18PF 1KV C0G/NP0 1808 is a type of ceramic capacitor. It has a capacitance value of 18 pF and operates within a tolerance of ±10%. The voltage rating for this component is 1000V or 1kV. This specific model belongs to the C0G, also known as NP0, series. Its physical dimensions are in accordance with the 1808 metric package size.