The CAP CER 3900PF 10V C0G/NP0 0805 is a specific type of ceramic capacitor. It has a capacitance value of 3900 pF and operates at a voltage rating of 10V. The C0G/NP0 designation indicates that it is a C0G (Class 0 Glass) or NP0 (NPO) type, which are both commonly used classifications for ceramic capacitors. The 0805 refers to the capacitor's case size in metric measurements, which corresponds to a length of 1.6 mm and a width of 0.8 mm. This particular component was introduced in the year 2012 under the metric system.