The CAP CER 91PF 250V C0G/NP0 0603 is a ceramic capacitor with a capacitance value of 91 picofarads. It has a voltage rating of 250 volts and operates within the C0G or NP0 temperature range, commonly used for its stability in various applications. This specific component uses the metric size designation of 1608 (0603 in imperial measurements).