SEK220M350ST

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Aluminum electrolytic capacitors are among the most common type of capacitor, widely used in consumer electronics. The SEK220M350ST is an aluminum electrolytic capacitor manufactured in China and commonly used in a variety of applications. In this article, we’ll discuss the application field and working principle of the SEK220M350ST aluminum electrolytic capacitor.

The SEK220M350ST aluminum electrolytic capacitor is a low-ESR polarized type capacitor with a 220μF (microfarad) capacity and 350V (volt) rated voltage. It has an 85℃ operating temperature and a rated ripple current of 2682mA (milliamperes). Due to these characteristics, the SEK220M350ST aluminum electrolytic capacitor is often used for motor drive and power electronics applications, where the ripple current or the voltage needs to be reduced.

When designing with aluminum electrolytic capacitors it is important to understand the working principle of the device. An aluminum electrolytic capacitor is a type of capacitor that utilizes an anode made of aluminum foil as the positive terminal and an electrolyte solution as the dielectric medium. The cathode is also made of aluminum but is coated with an oxide layer which acts as an insulator. This creates two layers: an electrolyte side and an anode side, them being separated by the oxide layer. When the capacitor is charged, electrons are absorbed by the anode and the oxide layer of the cathode simultaneously.

The applied current provides a flow of electrons in the anode and subsequently, the ions in the electrolyte are attracted towards the anode in order to maintain its electron balance. The oxide layer that separates the anode from the cathode acts as a dielectric, thus allowing the capacitor to store charge as electric energy. The voltage rating of the SEK220M350ST aluminum electrolytic capacitor is 350V which aids in providing security for the motor or power electronics application.

The SEK220M350ST aluminum electrolytic capacitor often find usage in applications where electric energy is needed. Examples of such applications include the motor drive circuit, motor starting circuit, and the electric power circuit. In motor drive circuits, the SEK220M350ST aluminum electrolytic capacitor acts as a filter element and rapidly responds to the changes in the voltage and current, reducing the electric ripple of the system.

Likewise, the SEK220M350ST aluminum electrolytic capacitor also has applications in the electric power circuit, as it provides excellent electric energy storage ability. The capacitor is also used to stabilize the electrical system and remarkably reduce the harmonic generated power caused by the electric load. Moreover, the high-temperature-resistance and low-ESR (Equivalent Series Resistance) characteristics of the SEK220M350ST aluminum electrolytic capacitor makes them the ideal choice for applications in motor starting circuits as these circuits often experience heavy starting current.

In conclusion, the SEK220M350ST aluminum electrolytic capacitor is an excellent choice for motor drive and power electronics applications where high-temperature resistance and low-ESR characteristics are required and electric energy storage ability is needed. The capacitor is capable of reducing harmonic generated power, stabilizing the electric system, and rapidly responding to changes in the voltage and current, making it an ideal choice for many applications.

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