The CAP CER 820PF 3KV X7R 1808 is a type of ceramic capacitor with specific characteristics. It has an 820 picofarad capacitance value and a tolerance of ±5%. This component can withstand voltages up to 3000 volts (3 kilovolts) and features the X7R dielectric material, which provides high reliability in various applications. The 1808 designation refers to its metric dimensions, while the part number also includes the reference code "4520".