USA1A220MDD

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Aluminum Electrolytic Capacitors

USA1A220MDD is an aluminum electrolytic capacitor, also known as electrolytic capacitor. Aluminum electrolytic capacitors are widely used by many electricians due to their relatively low cost and relatively high capacitance values in small sizes. The aluminum electrolytic capacitor is mainly composed of an aluminum oxide layer, a metal film, an electrolyte and a cathode collector.

The aluminum electrolytic capacitor is a non-polarized capacitor. The capacitance value of the electrolytic capacitor is expressed in Farads (F) and its minimum is 1μF. Its large capacitance value can reach up to 5000μF or even tens of thousands of μF. This type of capacitor has a wide range of applications.

Application Field

USA1A220MDD aluminum electrolytic capacitors have a wide range of applications in various electronic fields. Commonly used in power supplies, signal coupling, frequency bypass, DC blocking, rectification, damping circuits, etc. Also used in temperature control, timer, and other control circuits. It is widely used in switching power supply, power amplifier and inverter circuits. It is also widely used in home appliances such as televisions, computers and video players.

Work Principle

USA1A220MDD aluminum electrolytic capacitors are divisible into two cylindrical electrodes separated by an aluminum oxide film. The electrolyte is a liquid or gel defense, which allows ions to move from one electrode to the other, thus forming a capacitance. Positive charges accumulate on one electrode and negative charges accumulate on the other electrode, forming two electric fields and creating an electric potential between them. The structure of aluminum electrolytic capacitors enables them to produce a big capacitance.

Capacitance of electrolytic capacitors depends on the nature and thickness of the dielectric and the effective area of the electrodes. The main working principle of aluminum electrolytic capacitors, compared with ordinary capacitors, is that the use of electrochemical oxidation allows a very thin oxide diaphragm to be formed on the aluminum foil, so that the total capacitance value can be greatly increased in the same volume.

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