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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors, the most popular type of electrolytic capacitors, are polarized capacitors with an anode made of aluminum foil, etched with a uniform pattern of microscopic parallel conductive plates, separated by a thin layer of insulating dielectric oxide which also serves as the dielectric medium. An electrolyte containing a solution of an organic solvent and a salt bridges the conductive plates, which acts as the conductive material in the capacitor.

The most common application for aluminum electrolytic capacitors is in high-frequency analog and digital signal conditioning, such as coupling and decoupling capacitors, audio preamplifiers, power amplifiers and power supplies. For these applications, aluminum electrolytic capacitors are most often used because they offer the highest capacitance per unit volume, low voltage and temperature coefficients, and excellent stability. Additionally, aluminum electrolytic capacitors are used in power supplies for motors, switching devices, and DC-DC converters.

AFC477M16G24B-F application field and working principle

The AFC477M16G24B-F is an aluminum electrolytic capacitor manufactured by Panasonic. It is designed for long-life in high-temperature, high-pressure environments, withstanding temperatures up to 105° C. This makes it well suited for applications with high power and high voltage requirements.

The AFC477M16G24B-F is also designed as a high-frequency component with its own built-in noise-suppression unit. It features a low equivalent series resistance (ESR) and a high frequency response, making it an ideal choice for use in high frequency and high voltage applications, such as switching power supplies. Additionally, the AFC477M16G24B-F features a high capacitance-to-volume ratio, ensuring that it will provide reliable performance and reliability even when space is limited.

The AFC477M16G24B-F uses a dual-anode design, with two sets of conductive plates separated by an insulating dielectric oxide. This construction significantly reduces the current leakage and the deterioration of capacitance caused by the dielectric oxide. The use of dual anodes provides the capacitor with a high damping ratio, making it ideal for transient current and high-frequency noise suppression applications.

The AFC477M16G24B-F provides a high capacitance up to 470µF (at 105° C at 10V) while maintaining low ESR down to 16 mΩ. In order to ensure a long service life, the capacitor is AL-electrolyte sealed in resin as a resistance to environmental conditions. This ensures that the capacitor can continue to operate for long periods, even in extreme environments.

Overall, the AFC477M16G24B-F is an excellent choice for applications requiring long-life and high performance in high voltage and high-frequency circuits. With its high capacitance-to-volume ratio, low ESR, and high temperature resistance, the AFC477M16G24B-F is well suited for switching power supplies, audio preamplifiers, and other high-power, high-frequency circuits.

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