The CAP CER 3900PF 3KV X7R 1812 is a specific type of ceramic capacitor. It has a capacitance value of 3900 pF, with an tolerance of ±10%. This component can withstand a maximum voltage of 3000V (3kV). The designations "X7R" and "4532 Metric" provide additional information about the capacitor's properties and measurements.