The CAP CER 56PF 250V C0G/NP0 1808 capacitor is a type of ceramic capacitor with a capacitance value of 56 pF and a voltage rating of 250V. It has a tolerance of ±10% and falls under the classification of C0G, NP0 (1B) types in the 1808 package size, which corresponds to the metric designation of 4520.