A CAP CER 27PF 500V C0G/NP0 1808 is a type of ceramic capacitor with the following specifications: capacitance value of 27 picofarads (pF), tolerance of ±2%, and working voltage of 500 volts. It has a metric size code of 4520, equivalent to an 1808 designation in imperial units, and is classified as C0G/NP0 type with a grade of 1B.