Patent ID: 8059390

Claim:
An electrolytic capacitor comprising a capacitor element having an anode foil connected with an anode lead tab terminal and a cathode foil connected with a cathode lead tab terminal that are wound with a separator interposed therebetween, an outer casing housing the capacitor element, and a sealing body for sealing an opening part of the outer casing, wherein the anode lead tab terminal and the cathode lead tab terminal respectively have a lead wire welded with a boss member of the lead tab terminal and led out to the outside, wherein the lead wires respectively have a nickel plating layer, a palladium plating layer, and a gold plating layer in this order on the surface of a substrate, and the nickel plating layer has a thickness of 0.3 to 5.0 Î¼m, the palladium plating layer has a thickness of 0.01 to 0.10 Î¼m, and the gold plating layer has a thickness of 0.002 to 0.030 Î¼m.