The CAP CER 4PF 63V C0G/NP0 0505 is a type of ceramic capacitor with specific electrical characteristics. It has a capacitance value of 4 picofarads and operates at a voltage rating of 63 volts. This capacitor belongs to the C0G and NP0 (1B) series, indicating its temperature stability and tolerance for high-frequency applications. Its size is designated as 0505 in metric units (1313 in imperial measurement).