The CAP CER 39PF 500V C0G/NP0 0805 is a specific type of ceramic capacitor. It has a capacitance value of 39 pF and operates at a voltage rating of 500 volts. The designation C0G/NP0 indicates that it belongs to the Class I, Fixed, Ceramic Dielectric group. The component's dimensions are consistent with the 0805 (2012 Metric) size.