The CAP CER 220PF 3KV X7R 1808 is a ceramic capacitor with specific characteristics. It has a capacitance of 220 picofarads (pF), with a tolerance of ±5%. This component also features a voltage rating of 3000 volts (3kV) and uses the X7R dielectric material, which provides temperature stability within certain limits. The package type is specified as an 1808 metric size, corresponding to other designations like 4520 in imperial measurements.