The part number CAP CER 39PF 250V C0G/NP0 0805 refers to a specific ceramic capacitor with the following characteristics: capacitance value of 39 picofarads ±5%, voltage rating of 250 volts, and a size designation of 0805 (2012 Metric). This component belongs to the C0G or NP0 class, known for its stability and temperature resistance.