The CAP CER 3900PF 1KV C0G/NP0 2225 is a ceramic capacitor with specific characteristics. It has a capacitance value of 3900 pF and tolerates voltages up to 1000V or 1kV, classified as part of the C0G (NP0) family. Its case size corresponds to the designation "2225," also known as "5763 Metric" in some standards.