The specified component is a 1200 pF, ±20% 500V ceramic capacitor with the type designation of X7R and the package size of 1808 (or 4.3 mm x 2.5 mm). It has a capacitance value of 1200 picoFarads, operates within a voltage range of 500 volts, and is categorized as an X7R dielectric material. The metric reference number for this component is 4520.