This is a high-quality ceramic capacitor with a capacitance of 5.1 picofarads and a tolerance of ±0.25 picofarads, designed for use at voltages up to 200 volts. Its C0G/NP0 designation indicates that it meets the temperature-compensating specifications of the C0G (Class I) and NP0 (Class II) types. The capacitor is compact, with a metric size of 0805.