The part number CAP CER 12PF 16V C0G/NP0 1808 refers to a specific ceramic capacitor. It is a 12 picofarad capacitance value with ±10% tolerance and has an operating voltage of 16 volts. The type is designated as C0G, also known as NP0, indicating a temperature-stable ceramic material. The part is packaged in the metric size 1808 (a diameter of 4.2 millimeters and a height of 1.6 millimeters).