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Aluminum electrolytic capacitor

Electrolytic capacitors generally consist of wound-on layers of an anode foil, the surfaces of which may be roughened and which is provided with a dielectric oxide layer, a cathode foil and spacing means between the cathode and anode foil which is saturated with an operating electrolyte. An aluminum electrolytic capacitor is composed of a capacitor element formed by winding an anode foil and a cathode foil through a separator, an electrolyte solution for driving impregnating this capacitor element, a metal case containing this capacitor element, and an elastic sealing member sealing the metal case. The positive electrode foil is conventionally manufactured by the following procedure. An aluminum foil is etched to increase its effective surface area and coated by anodizing process with a dielectric oxide film. Aluminum anodes for use in electrolytic capacitors are formed by electrolytically etching aluminum foils and then electroforming the etched foils to form oxide coatings on the surfaces. The chemical or electric properties of the electrolyte, such as electric conductivity and scintillation voltage become main factors for determining the electric properties of the electrolytic capacitors. As the electrolyte solution for driving, various electrolyte solutions are used depending on the required performance of the aluminum electrolytic capacitor. In the case of requirement of reliability of aluminum electrolytic capacitor at high temperature and high humidity, the electrolyte for driving having a high electric conductivity and an excellent thermal stability is required.

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Aluminum electrolytic capacitor product listings

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