The CAP CER 470PF 630V C0G/NP0 1812 is a ceramic capacitor with a capacitance of 470pF and a voltage rating of 630V. It is classified as a C0G or NP0 type, which stands for Ceramic 0 Gauss or Negative Positive 0 respectively, indicating it has very low loss characteristics and a high degree of stability across temperature ranges. The metric designation 1812 refers to the physical size of the component in millimeters, with an approximate diameter of 18mm and length of 12mm.