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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are polarized capacitors whose anode electrode is made of a pure aluminum foil with an etched surface. The aluminum foil forms a large number of pseudo-capacitance double layers, each of them consisting of microscopic parallel fingers formed by etching the aluminum surface. A variety of electrolytes are used on the anode electrode but all electrolytes provide an ionic conductivity path within which the mobile ions are the charge carriers.

The 400SAW82MEFC18X30 aluminum electrolytic capacitor is a special design for high power pulse applications with working voltage ratings from 10V up to 200V. With this part, you get a high rated voltage with high reliability ratings, making it ideal for high power operation. It also offers good resistance to temperature, moisture and humidity. The capacitor can provide good stability and long-term reliability in a wide variety of operating environments.

Application Field and Working Principle

The 400SAW82MEFC18X30 aluminum electrolytic capacitor is most commonly used in power supply applications as a voltage dropper/regulator. This is due to the capacitance characteristics of this type of capacitor which allows it to handle higher transient loads such as those encountered in high power pulse applications. In these applications, the capacitor acts as a filter to eliminate voltage spikes and reduce noise. The working principle of an aluminum electrolytic capacitor is based on the action of the electric charge stored within its polarized dielectric material, which in this case is an aluminum foil. The electric charge attracts and holds onto other charged molecules, thus creating an electric field and establishing an electric potential difference between the two electrodes.

The high electrical potential difference created between the anode and cathode results in an increase of the anode’s capacitance. As current is applied, the electric charge stored in the anode increases and creates an electric field proportional to the applied voltage. This electric field travels through the electrolyte and creates a transfer of electrons from the anode to the cathode. As current flows, electric charge is drawn from the anode and this electric charge impedes the current, hence the capacitor’s role as a voltage dropper and regulator.

400SAW82MEFC18X30 aluminum electrolytic capacitors are also used in DC/DC converters, voltage multipliers, power supply circuits, and other high-power topologies. They can provide various capacitance values in a wide variety of operating temperatures. Furthermore, the capacitors are usually manufactured with a low-ESR (equivalent series resistance), making them ideal for high-frequency applications. Lastly, the 200V rating of this capacitor ensures an ample amount of headroom, even for high power pulse applications.

Conclusion

The 400SAW82MEFC18X30 aluminum electrolytic capacitor is an ideal choice for high power pulse applications due to its high rated voltage and long-term reliability. It offers excellent resistance to temperature, moisture and humidity, and features a low-ESR for high-frequency operation. These capacitors are widely used in power supply circuits, DC/DC converters, voltage multipliers and other high-power topologies where the appropriate capacitance, long-term reliability and operational voltage ranges are required. In conclusion, aluminum electrolytic capacitors offer a great solution for high power pulse applications.

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