The CAP CER 2.1PF 25V C0G/NP0 008004 is a specific type of ceramic capacitor with the following characteristics: it has a capacitance value of 2.1 pF, tolerance of ±0.25 pF, and operates at a voltage rating of 25V. It belongs to the C0G or NP0 dielectric class, commonly used for its stable temperature characteristics and low losses. The capacitor is available in a metric case size of 0201.