MAL213655271E3

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are a type of capacitor that uses an aluminum oxide layer as the dielectric medium. The oxide must be formed in situ by passing a current through it while creating a voltage between the oxide and the aluminum. The oxide layer acts as an ionic material with a very high dielectric constant and helps the capacitor hold a large amount of charge.

Aluminum electrolytic capacitors are commonly used in power supplies and other high-current applications. They are usually characterized by very low equivalent series resistance (ESR), making them useful for filtering and decoupling in power supplies. In addition, aluminum electrolytic capacitors can be used in motor control systems, dynamic braking systems, and switching power supplies.

MAL213655271E3 Application Field

The MAL213655271E3 is a general purpose aluminum electrolytic capacitor operating up to a rated ripple current of 2.3A and over a temperature range of -55°C to +105°C. It has good performance in high temperature operation and high ripple current. It is widely used in low-frequency applications like AC motors, audio/video equipment, power electronic systems, electric tools, and control systems.

MAL213655271E3 Working Principle

Electrolytic capacitors work on the principle of electrolytic action induced by two opposed electrodes submerged in a liquid. This liquid is usually an electrolyte. The electrolyte is typically an alkaline solution (normally potassium hydroxide) but it can be any liquid capable of conducting electricity.

The electrodes are typically made of aluminum, and one of them is etched with microscopic pores, giving it a high surface area. This etched electrode is then referred to as the anode. The other electrode is connected to the external circuit and is referred to as the cathode. When a voltage is applied to the capacitors, the anode undergoes a reaction with the electrolyte, forming an electrically conductive oxide film.

The oxide layer acts as a dielectric medium between the two electrodes, allowing a charge to be held. This charge can then be used for various applications such as decoupling, filtering, and energy storage. The current leakage, known as equivalent series resistance (ESR), of a typical aluminum electrolytic capacitor is usually much lower than other types of capacitors, making it useful in high-current applications.

To ensure stability and robustness, the MAL213655271E3 utilizes a combination of a radial mass-flux aluminum foil and a highly reliable organic electrolyte. This combination gives the capacitor excellent temperature stability and high ripple current capacity.

Conclusion

The MAL213655271E3 aluminum electrolytic capacitor is ideal for a variety of power supplies and other high-current applications. It offers a low ESR, making it suitable for filtering and decoupling, and is also suitable for motor control systems, dynamic braking systems, and switching power supplies. Its combination of a radial mass-flux aluminum foil and a highly reliable organic electrolyte ensures stability and robustness in a wide range of operating environments.

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