The CAP CER 12PF 630V C0G/NP0 1210 is a specific type of ceramic capacitor. It has a capacitance value of 12 pF and operates at a voltage rating of 630V. The C0G designation indicates that it is part of the temperature-compensating ceramic class, often referred to as NP0 (1B). This particular component comes in the 1210 package size, which corresponds to the metric dimension of 3225.