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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are among the most commonly used capacitors in electronics and electric engineering. They are typically polar devices which means they have a positive and negative terminal and can store electrical charge. The common characteristics of an aluminum electrolytic capacitor makes them suitable for a wide variety of applications which includes direct current power supplies, motors, relays, amplifiers, consumer electronics, transient suppression, and RF energy storage. In this article, we will take a closer look at the EEU-HD1E472 aluminum electrolytic capacitor and discuss its application field and working principle.

EEU-HD1E472 Summary

The EEU-HD1E472 aluminum electrolytic capacitor is a radial leaded capacitor developed by Panasonic. It has a capacitance of 47uF, a rated voltage of 25V, and a temperature range of -40 to +105 °C. It is comprised of an aluminum electrolytic material with a special mixture of surfactants and is composed of two aluminum foils and a spacer film. The device is housed in a molded body of epoxy resin. It features a radial lead construction which makes it easy to attach to a PCB and has an operating life of 2500 hours at 105°C. It also has improved vibration and shock resistance due to its epoxy body.

Application Field

The EEU-HD1E472 aluminum electrolytic capacitor is suitable for use in a wide variety of DC power supplies, relays, consumer electronics, amplifier circuits, and other devices requiring a low ESR and long operating life. It is designed to withstand long-term stress from pulsed currents and can be used for temperature sensitive, pulse DC, and low-voltage applications. Its high capacitance and low ESR make it a good choice for decoupling and ripple filtering in regulated low-voltage power supplies. Additionally, it\'s radial lead construction makes it suitable for through-hole mounting.

Working Principle

An aluminum electrolytic capacitor consists of two aluminum electrodes immersed in an electrolyte. The electrodes are kept separated by an insulator known as a dielectric. The two electrodes form two electrical capacitors which act together as one capacitor with a certain capacitance. The electrical charge is stored in the capacitor by the attraction between two surfaces with opposite charge. When a voltage is applied across the capacitor, a current flows through the electrolytic material which results in a surface charge on each of the electrodes. This charge then acts like a capacitor and stores energy. When the voltage across the capacitor is removed, the charge is released and the capacitor can start storing the charge again.

Conclusion

The EEU-HD1E472 aluminum electrolytic capacitor is a highly reliable component that is suitable for a variety of DC power supplies, relays, amplifiers, consumer electronics, and other low-voltage applications. It features a low ESR and a long operating life which makes it a great choice for dc-dc converters, decoupling, and ripple filtering in regulated power supplies. It is composed of two aluminum foils and a spacer film, and is housed in an epoxy body which increases its shock resistance. Overall, the EEU-HD1E472 is an ideal choice for applications involving a low ESR and long operating life.

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