The CAP CER 39PF 63V C0G/NP0 1812 is a specific type of ceramic capacitor. Its key characteristics include a capacitance value of 39 pF and an operating voltage of 63 volts. The designation "C0G" or "NP0" indicates that it falls under the Class I temperature compensating category, where the capacitance remains stable across various temperatures. This capacitor has a 1812 metric case size, which is equivalent to the 1B (or 0402) case size in imperial units.