The CAP CER 390PF 1KV C0G/NP0 1825 is a type of ceramic capacitor. It has a capacitance value of 390 pF and an operating voltage of 1000V. The ceramic material used in this capacitor is C0G, also known as NP0, which is a type of dielectric material with low loss factor and high stability over temperature. The 1825 designation refers to the size or package type, which is metric.