The CAP CER 3900PF 250V C0G/NP0 1210 is a type of ceramic capacitor. It has a capacitance value of 3900 pF and operates at a voltage rating of ±250V. This capacitor adheres to the C0G/NP0 specification, which is characterized by its stability over a wide range of frequencies and temperatures. The designation "1B" indicates that it meets the requirements for Class I components according to MIL-PRF-55339. Its 1210 case size corresponds to a metric dimension of 3225.