The CAP CER 3.9PF 250V C0G/NP0 0805 is a specific type of ceramic capacitor. It has a capacitance value of 3.9 pF with an accuracy of ±0.25pF and can withstand a voltage of up to 250V. The C0G/NP0 designation indicates that it belongs to the Ceramic Class (C0G) with a temperature coefficient of N/A, while its packaging is in the Metric size 0805 (2012).