A ceramic capacitor with the designation of CAP CER 3.9PF 300V C0G/NP0 0603 has a capacitance value of 3.9 pF and an accuracy rating of ±0.5pF, with a maximum voltage rating of 300 volts. It uses the C0G/NP0 dielectric material type, which is also known as Type 1B in some specifications, and is available in the 0603 (or 1608 metric) size package.