The CAP CER 15PF 630V C0G/NP0 1808 is a type of ceramic capacitor. It has a capacitance value of 15 pF and operates at a voltage of 630 volts. The capacitor uses the C0G/NP0 dielectric material, which is suitable for applications requiring stability over a wide temperature range. The 1808 package size refers to its metric dimensions.