The CAP CER 51PF 200V C0G/NP0 0805 is a ceramic capacitor with a capacitance of 51 picofarads and a voltage rating of 200 volts. It has a tolerance of ±2% and is part of the C0G or NP0 class, which is known for its stability over temperature. The package size is 0805 (2012 metric), indicating its dimensions are 1.6mm x 0.8mm.