250TXW47MEFC8X35

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Aluminum Electrolytic Capacitors

An aluminum electrolytic capacitor is an electrochemical device that stores energy electrostatically. It is composed of two aluminum foil electrodes, an electrolytic layer, and a non-conductive layer which separates the layer. This 250TXW47MEFC8X35 model of aluminum electrolytic capacitor is a high-voltage capacitor with a capacity of 47µF/355V. It has a maximum operating temperature of 105°C and a maximum ripple current of 1.9A.

Application Field

Aluminum electrolytic capacitors are widely used across many industries in a variety of applications. For example, they are used in automotive, industrial, and consumer electronics, such as switching power supplies, audio equipment, computers, and other electronic devices. In addition, aluminum electrolytic capacitors are used in medical devices and appliances, such as printers, medical imaging equipment, and air conditioners.

Working Principle

Aluminum electrolytic capacitors operate on the principle of electrolysis. Electrolysis is the process in which an electrical current is passed through a liquid in which ions are dissolved. This causes the ions to move toward the electrodes, where they are deposited and form a layer of conductive material on the electrodes. This layer, also known as the dielectric layer, stores energy electrostatically and alters the capacitance of the capacitor.

The electrolytic layer of an aluminum electrolytic capacitor consists of an organic electrolyte (usually ethylene glycol) and a foil anode. The electrolyte material allows electric charge to flow more easily between the two electrodes. The anode foil is composed of an aluminum foil layer, which is covered with an electrically insulating oxide layer. This oxide layer acts as a barrier to prevent current from entering the capacitor and prevents electrochemical reaction which could decrease capacitance.

When a voltage is applied to the capacitor, the anode attracts positive current from the electrolyte. This current passes through the oxide layer and is stored in the capacitance, increasing the capacitance of the capacitor. The reverse occurs when the current is reversed, allowing the oxide layer to act as a resistor, storing the charge in the capacitor.

Aluminum electrolytic capacitors are available in a variety of sizes and voltages, making them suitable for a wide range of applications. Despite their low cost and energy efficient design, aluminum electrolytic capacitors are also widely used due to their high capacitance and ability to withstand high voltages. They are an essential component in many electronic devices, from consumer electronics to medical imaging equipment.

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