The Vishay F561K39S3NR63K7R is a ceramic disc capacitor belonging to the F Series. It features high reliability, low losses, and a high capacitance-to-volume ratio, making it suitable for demanding electronic circuits. The capacitor's construction includes a ceramic disc with silver plating and tinned copper leads. It is encapsulated in flammable-resistant epoxy resin (UL 94 V-0). Typical applications include SMPS, HF ballast, snubber circuits, and high-voltage applications. The capacitor's dielectric strength is 200% of the rated voltage, and its insulation resistance is a minimum of 10,000 MΩ.