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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors or electrolytic capacitors are energy-storage elements that differ from conventional capacitors in that they use a liquid, non-solid electrolyte as the dielectric medium, with an anode and a cathode that are generally composed of aluminum. With their simple principle of operation, electrolytic capacitors are ideal for use in power supply, signal filtering, and decoupling applications.

Among the types of electrolytic capacitors, the SEK101M050ST is a high-performance aluminum electrolytic capacitor that provides higher capacitance and longer life in a slim package size compared to standard-performance types. This makes it ideal for use in equipment that must maintain a slim profile or where space is limited.

Application Field

The SEK101M050ST aluminum electrolytic capacitor is ideal for various application fields that require compact size and high capacitance, including aircraft, measuring instruments, and factory automation machinery. It is also suited for use in electronic equipment such as computers and network communication related products.

Additionally, due to its high capacitance, robust internal construction, and long life, it is suitable for use in high load peak operation applications, for example, for blocking direct current, decoupling circuits, and timing circuits. Its temperature range is possible from -40°C to +125°C and its capacitance range is from 1000μF ~ 4700μF.

Working Principle

The SEK101M050ST aluminum electrolytic capacitor works by using a physical process called dielectric absorption. Dielectric absorption is a phenomenon where the applied voltage causes a charge to be stored on the oxide layer that forms the dielectric of the capacitor. This stored charge allows the capacitor to function with a higher capacitance in a smaller size than is possible with other types of capacitors.

The construction of the capacitor involves a plated aluminum sheet, which forms the anode, and a series of etched aluminum plates separated by paperboard between them, which form the cathode. A liquid non-solid electrolyte is used as the dielectric medium, with a solid dielectric protecting the anode. This allows for the production of higher capacitance values than can be achieved with conventional capacitors.

The inherent design of the capacitor is such that it holds up well in high temperature operation, high frequency operation, and applications with high current loads. This makes it well suited for power applications such as power supplies and motor controls.

Conclusion

The SEK101M050ST aluminum electrolytic capacitor is an ideal choice for applications that require a high capacitance and a slim package size. Its robust construction and long life make it suitable for use in power applications, while its dielectric absorption principle allows for higher capacitance values in a smaller size than is possible with other types of capacitors. Its temperature range and capacitance range cover a wide range of applications and make it suitable for a variety of applications in aircraft, measuring instruments, factory automation machinery, and electronic equipment.

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