The CAP CER 15PF 63V C0G/NP0 1812 is a specific type of ceramic capacitor. It has a capacitance value of 15 picofarads with a tolerance of ±10 percent and can withstand a maximum operating voltage of 63 volts. This component belongs to the C0G or NP0 temperature coefficient class, which indicates it has a stable capacitance across varying temperatures. The designation "1B" signifies that this capacitor meets certain performance standards. The package size is designated as 1812, which corresponds to a metric measurement of 4.53 millimeters in length and 3.52 millimeters in width.