The specified capacitor is the CAP CER 820PF 1.2KV C0G/NP0, designed for use in high-voltage applications with a capacitance of 820 pF and a rated voltage of ±1200V. Its metric designation is 1812, equivalent to the 4532 designation in imperial units, while its ceramic material type is C0G/NP0, classified as 1B, indicating precise temperature characteristics.