The CAP CER 91PF 50V C0G/NP0 0603 is a ceramic capacitor. It has a capacitance value of 91 pF and operates at ±2 deviation. The voltage rating for this component is 50 volts, and it follows the C0G and NP0 designations which signify its stability across temperature. The package size is 0603 (or 1608 metric), indicating its compact dimensions.