The ceramic capacitor is specified as CAP CER 18PF 630V C0G/NP0 1812. It has a capacitance of 18 pF with a tolerance of ±2 and can withstand voltages up to 630V. The C0G designation refers to its temperature stability characteristics, while NP0 signifies it is also known as the 1B or 4532 metric size 1812.