EKMM421VSN181MP45S

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Aluminum Electrolytic Capacitors

EKMM421VSN181MP45S Application Field and Working Principle

The EKMM421VSN181MP45S series aluminum electrolytic capacitor, often also called aluminum electrolytic capacitor, is a polarized capacitor component with a wide range of applications. In electrical circuits, it plays a role in electrical energy storage and frequency selection. Compared with other capacitors, this series of capacitors has a large capacitance per unit volume, and can store large amounts of energy with less space. Because of this, it is often used in electric circuits that require large capacitance, small physical size, and high electrical energy storage capabilities.

Application Field

The EKMM421VSN181MP45S aluminum electrolytic capacitor is used in many industries, not only in industrial, automotive, and consumer electronic products, but also in military and aerospace applications.

In the industrial field, the aluminum electrolytic capacitor is widely used in the electrical control system, UPS power supply system, and the power drive system of electro-mechanical equipment. It can effectively solve the problem of system voltage instability. What\'s more, it can also lengthen the life expectancy of system’s transistors or integrated circuits. This series capacitor is also widely used in the drive control system of medical equipment, automated manufacturing systems, automotive electronic systems, temperature and humidity control systems, instrumentation and safety monitoring systems, industrial control systems and power distribution systems.

In the automotive industry, aluminum electrolytic capacitors are used in various electronic systems, such as engine control systems, airbags, active noise reduction systems, keyless entry systems, and electric windows. The capacitors are strictly tested in a wide range of automotive environmental tests to ensure that the capacitors can operate reliably in the harsh automotive environment.

In the consumer electronics industry, aluminum electrolytic capacitors are used in many products, such as mobile phones, music players, digital cameras, drones and other electronic components and products that require a low profile.

In the military and aerospace fields, this series capacitor is used due to its excellent stability and reliability. It provides the system with low ESR, long shelf life, and working temperature up to 105 degree C.

Working Principle

The EKMM421VSN181MP45S aluminum electrolytic capacitor is a kind of the polarized capacitor, consisting of two metal sheets, an electrolyte and a dielectric separator. The two metal plates are usually an aluminum cylindrical plate as anode and a layer of oxide film as a cathode. The two plates are separated by a layer of insulating material (separator). The electrolyte is injected between the oxide film and the aluminum plate through an special injection.

When the external electric field applied, the positive charge will migrate to the oxide film, and due to the electric field, the protons of electrolyte will be attracted to the oxide film. As a result, the electric field increases, and the inner electric field with a high strength will strongly attract the negative charges (electrons) from the anode and accumulate on the oxide film near the aluminum plate, forming a capacitor. The capacitance of an aluminum electrolytic capacitor is directly proportional to the effective area of its electrodes and directly proportional to the thickness of the nonconductive oxide film on the aluminum anode.

The energy storage capability of EKMM421VSN181MP45S series aluminum electrolytic capacitor mainly depends on the capacitance, size and internal series resistance of the capacitor. The voltage rating of the EKMM421VSN181MP45S is 50V, and is mainly used for working voltage below 50V.

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