The part number is CAP CER 27PF 500V C0G/NP0 0805. It is a ceramic capacitor with the following specifications: capacitance value of 27 pF ±5 and voltage rating of 500V, in the 0805 package type, which corresponds to the metric size 2012. This component belongs to the C0G or NP0 grade, indicating it has a stable temperature coefficient.