MAL212836478E3

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are one of the most popular and widely used capacitors. These are polarized capacitors having an anode made from a pure aluminum foil and a cathode made from an oxidized aluminum foil. The anode is rolled up into a cylinder and placed in an electrolyte solution, usually aqueous. This allows the forming of a thin oxide film on the aluminum foil, which serves as a dielectric layer, and creates a capacitor.

MAL212836478E3 Application Field

MAL212836478E3 aluminum electrolytic capacitors are a kind of miniature, high-voltage, snap-in style electrolytic capacitors. They are suitable for use in circuits with higher voltage demands and are ideal for applications which require a high inrush current or a long ripple life expectancy. Most notably, these capacitors are widely used in thermostats, and switching power supply circuits.

MAL212836478E3 Working Principle

The MAL212836478E3 aluminum electrolytic capacitors are sealed within a metallic casing. The capacitor elements consist of two layers of special anode and cathode foil, with a separator (paper sheet) between them soaked in an electrolyte, usually aqueous, solution. The anode is made up of an aluminum foil and the cathode consists of an adherent oxide (usually formed by exposure to a fouling environment or electrochemical oxidation) of a pure aluminum foil.

The current flows from the positive terminal of the capacitor to the negative terminal through the electrolyte solution. The current creates an electric field in the capacitor which causes the electrodes to undergo reaction and form corrosion products which are deposited on the electrodes. This process generates a potential difference between the two poles of the capacitor. This potential difference is termed as the capacitance.

Conclusion

In summary, MAL212836478E3 aluminum electrolytic capacitors have a long ripple life expectancy and are suitable for use in a multitude of applications where high voltage demand is needed. These capacitors are sealed within a metallic casing and consist of two layers of special anode and cathode foil, with a separator soaked in an electrolyte. The current flows from the positive terminal to the negative terminal which generates an electric field and creates a potential difference between the two poles of the capacitor.

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