The part number CAP CER 680PF 630V C0G/NP0 1206 refers to a specific type of ceramic capacitor. This component has a capacitance value of 680 pF and can withstand voltages up to 630V. It belongs to the C0G or NP0 temperature coefficient class, which indicates its stable characteristics over varying temperatures. The component is packaged in the 1206 (3216 Metric) case size.