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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors, also called electrolytic capacitors, are capacitors that use a chemical reaction between aluminum and an electrolyte to form an oxide layer on the aluminum surface. The layer acts as the dielectric for the capacitor. These capacitors are characterized by their large size, low cost, and high capacitance.

The application of 678D108M020DT4J Aluminum Electrolytic Capacitor is mainly in applications where high capacitance is needed such as power supplies, motors, AC/DC conversion, input/output filtering, instrumentation and other industrial applications. It is also ideal for audio and radio frequency applications as well as voltage drops across them.

The working principle of 678D108M020DT4J aluminum electrolytic capacitor relies on the oxide layer that is formed on the aluminum foil as the dielectric. When a voltage is applied across the capacitor, an electric field is generated which causes ions to move from the electrolyte into the aluminum foil. These ions form the oxide layer which acts as the dielectric and increases the capacitance of the capacitor. The electrolyte also provides the electrons that are needed for this reaction to occur.

As with all capacitors, the plate size, distance between them, and material used determine the capacitance. In aluminum electrolytic capacitors, the capacitance is determined by the area of the aluminum plate, the distance between them, and the thickness of the oxide layer. Higher capacitance can be achieved by increasing the plate area, decreasing the distance between them, or increasing the oxide layer thickness, but at the same time, the temperature, voltage, and frequency of use must also be taken into account to ensure the reliability of the capacitor.

When selecting an aluminum electrolytic capacitor, one must consider the application, voltage and temperature parameters, frequency of use and other physical parameters such as size and weight. The 678D108M020DT4J model has a maximum operating voltage of 35V, a rated capacitance of 108/microfarads, and an insulation resistance of 4 megohm, making it well suited for most industrial and audio applications.

Overall, 678D108M020DT4J aluminum electrolytic capacitor is an ideal and cost effective choice for a variety of application fields where high capacitance is required. Its working principle is based on the oxide layer formation on the aluminum surface, which makes the capacitor able to store larger amounts of energy in a smaller size than other types of capacitors.

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