The CAP CER 820PF 250V X7R 1808 is a specific type of ceramic capacitor, designed to meet certain electrical requirements. This component has a capacitance value of 820 picofarads (pF) and operates at a voltage rating of 250 volts with a tolerance of ±20%. It conforms to the X7R dielectric classification, which indicates its temperature coefficient and stability characteristics. The designation "1808" refers to its metric case size, equivalent to the imperial designation "4520".