The CAP CER 91PF 500V C0G/NP0 1111 is a ceramic capacitor with a capacitance of 91 picofarads and a voltage rating of 500 volts. It has a tolerance of ±2% and is part of the C0G/NP0 (1B) series, with an identification code of 1111. This specific capacitor is available in metric packaging as well as standard 2828 size.