UES0J221MPM1TD Capacitors

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Aluminum Electrolytic Capacitors

An aluminum electrolytic capacitor, also called an aluminum-in-foil capacitor, consists of two metal plates with a layer of porous metal oxide between them. The dielectric is the metal oxide layer, which is formed by a process called electrolysis. The metal oxide layer acts like a barrier that allows only certain frequencies of electrical energy to pass through. This makes aluminum electrolytic capacitors ideally suited for use in filters, which pass only certain frequencies.

The type UES0J221MPM1TD capacitor is a standard axial-leads aluminum electrolytic capacitor of the 250Vdc series. It has a voltage rating of 250 Vdc and a capacitance of 0.22 uF. The UES0J221MPM1TD has a temperature range of -55°C to 105°C, and a maximum operating frequency of 120 Hz. The temperature of the capacitor should not exceed the operating temperature range to ensure reliable operation and long life.

Application Field

The UES0J221MPM1TD can be used in a variety of electronic applications where reliable filtering or high-voltage power conditioning is required. It is suitable for use in audio power supplies, power amplifiers, high-voltage power supplies, and high-frequency applications. It can also be used for common-mode suppression, such as used in printers, medical equipments and other applications. In addition, it is often used in switching power supplies, where it provides excellent performance with low ESR.

Working Principle

The working principle of an aluminum electrolytic capacitor is based on the electrical property of Faraday’s law of electromagnetic induction. The aluminum foil acts as an electrode when energy is applied, allowing current to flow between the positive and negative plates of the capacitor. This flow of current is referred to as a capacitive coupling. When a capacitive charge is applied between the two plates of the capacitor, electrons are attracted to the positive plate and repelled from the negative plate, charging the capacitor. The charge created by the electric current causes the two plates of the capacitor to become polarized.

The dielectric material, which is sandwiched between the two plates of the capacitor, acts as an insulator between the two plates, preventing electric current from flowing between them. This insulating material is typically an electrolytic solution or a thin layer of aluminum oxide. The electric current that is applied to the capacitor is then stored in the insulating material, allowing voltage to be stored within the capacitor until it is discharged.

When a voltage is applied to an aluminum electrolytic capacitor, a capacitive charge is created between the two plates. This capacitive charge resists the flow of electric current, and this resistance is known as capacitive reactance. This capacitive reactance is what allows a capacitor to filter electric current, while still allowing other current to pass freely through. The higher the capacitance value, the greater the capacitive reactance.

The UES0J221MPM1TD aluminum electrolytic capacitor is an ideal choice for a wide range of electronic applications, offering reliable filtering and conditioning while operating in an extended temperature range. Its ability to store electric energy and resist current makes it an ideal choice for audio power supplies, high-voltage power supplies, power amplifiers, and other high-frequency applications.

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