The CAP CER 2.1PF 25V C0G/NP0 008004 is a specific type of ceramic capacitor. It has a capacitance value of 2.1 pF and a tolerance of ±0.1 pF, with a voltage rating of 25V. This component is classified as a C0G (NP0) type, which indicates its temperature stability characteristics. The designation "008004" represents the packaging or case size, while "(0201 Metric)" specifies the metric dimensions.