MAL204851471E3

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors (ALEC) are electrochemical capacitors in which electrolytic anode is made of aluminum foil covered with oxide layers. The etching process enables the foils to become very thin and high-surface-area. These thin anode foils are the main reason for the high capacitance values.

Aluminum electrolytic capacitors consists of two or three components: Electrolytic anode foil, electrolyte and separator. The electrolyte is a liquid or solid chemical which creates a layer of oxide on the anode foils surface. This creates a barrier between the cathode and anode foil, preventing unwanted short-circuit. The separator creates a barrier between the electrolyte and the foil, preventing unwanted electrical interaction.

The most common application of ALEC is energy storage. They are widely used in power supplies, clock circuits, DC-DC converters, and capacitive dividers. In addition, ALEC are also used as filters in switching power supplies and in AC-DC converters, as well as in high temperature and high voltage applications.

The working principle of ALEC is based on Faraday\'s law of electrolysis. This law states that when a direct current flows through an electrolyte, metal ions in the electrolyte are reduced at the cathode and oxidized at the anode. The resulting charged ions form a metallic film which increases the capacitance of the component.

In the case of the MAL204851471E3, when the coil is energized the current flows through the anode foil, which causes a dielectric layer to form on the surface. This acts as a barrier between the anode and cathode. This dielectric layer increases the capacitance of the capacitor. When the current is interrupted, the dielectric layer breaks down and the capacitor returns to its original state.

An advantage of the MAL204851471E3 is its high temperature rating and long life span. This type of capacitor is designed for applications in harsh environments, where temperatures can reach up to 150°C. In addition, the capacitor is designed to work for up to 5000 hours, making it suitable for long term applications.

In conclusion, the MAL204851471E3 aluminum electrolytic capacitors are widely used in many applications due to their high capacitance and long-term reliability. They are perfect for applications in harsh environments due to their high temperature ratings and long life span.

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