A ceramic capacitor with the part number CAP CER 15PF 500V C0G/NP0 1210 has a capacitance of 15 picofarads and operates at a voltage of 500 volts. It is classified as a C0G, or NP0, type which indicates its stable temperature characteristics. The capacitor's dimensions are specified using the metric system, with the code 3225 referring to the size in millimeters.