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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are very versatile components and can be utilized in a variety of applications, from low-voltage to high-voltage and from low current to high current. They are available in different sizes, shapes, and voltage types. One type of aluminum electrolytic capacitors is the LGL2G681MELC35.

Application Field of LGL2G681MELC35

The LGL2G681MELC35 is an aluminum electrolytic capacitor specifically designed for high-voltage applications. It features very low Equivalent Series Resistance (ESR) and high-temperature stability. This makes it perfect for power supplies and filters in applications like PCs, hard disks drives, and solar charge controllers. It is also well-suited for DC-DC converters, automotive systems, power supplies, and audio/video equipment.

Working Principle

Aluminum electrolytic capacitors work like regular capacitors, but they have a liquid electrolyte instead of a solid dielectric material. This liquid, composed of boric acid and sodium hydroxide, between the two sets of aluminum plates forms an electrolyte solution. This solution allows for current to pass through the electrolyte and between the metal plates, creating an electrical pathway.

The current passing through the electrolyte starts forming a very thin layer of aluminum oxide on the surface of the plates. This layer acts like an insulator, but it is still highly conductive, which is why aluminum electrolytic capacitors have much higher capacitance values than other types of capacitors. This is also why their operating voltage is usually much higher than other capacitors.

The capacitance value is determined by the size and number of metal plates and the amount of liquid electrolyte. The more plates and electrolyte, the greater the capacitance value. The leakage current is usually very low due to the thin aluminum oxide layer formed on the plates.

Conclusion

The LGL2G681MELC35 aluminum electrolytic capacitor is a great choice for high-voltage applications due to its low ESR and high-temperature stability. It works like a regular capacitor, but with a liquid electrolyte that allows for a much larger capacitance. Its large capacitance value gives it a higher operating voltage than other capacitors, making it perfect for high-voltage applications.

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