EEV477M016S9MAA

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are composed of two or three aluminum foils with a layer of electrolyte between them, forming a three-dimensional electric double-layer capacitor. They are one of the most widely used passive components in all electronic equipment. The specific EEV477M016S9MAA is an aluminum electrolytic capacitor manufactured by UnitedChems Tec. Specifically, it is 47 μF with ± 20%, 400V DC voltage rating and an equivalent series resistance of 7.28 mΩ at 20°C.

Application Fields

Aluminum electrolytic capacitors are versatile because of their high capacitance and low series resistance. The EEV477M016S9MAA is usually used for energy storage, frequency compensation, buffering, filtering, and bypass applications in electronic power systems; for input smoothing in power plants; and as decoupling capacitors in the fan motors of freezers, air conditioners, and condensers. Additionally, it is beneficial for telecom installations such as emergency systems, plasma discharge circuits, and other high-frequency circuits.

Working Principle

An aluminum electrolytic capacitor consists of two or three aluminum foils rolled around in an aluminum cylinder for support and an electrolyte in between layers. The capacitor is then sealed in a rigid epoxy shell and an anode and cathode terminal is connected to the desired points in the circuit. When a DC voltage is applied across the capacitor’s terminals, the DC voltage causes an electric field to build up between the anode and cathode, which changes the ion density in the electrolyte. The ions then form a double electric layer with charge carriers, and this creates the capacitance of the capacitor. The capacitance of an aluminum electrolytic capacitor is several orders higher in comparison to other capacitors.

Aluminum electrolytic capacitors also have an equivalent series resistance, abbreviated as ESR. This is a measure of how much the capacitor’s total resistance increases when an electrical current flows through it. The ESR of the EEV477M016S9MAA is 7.28 mΩ, which is considered low relative to other capacitors.

Another typical measure of a capacitor is the temperature range it can operate in. The EEV477M016S9MAA capacitor can operate in temperatures ranging from -55℃ to 105 ℃. This temperature range indicates that the capacitor can be used in a variety of environments.

In summary, aluminum electrolytic capacitors are highly versatile components, and can be used in a variety of applications. The EEV477M016S9MAA capacitor is an example of one such aluminum electrolytic capacitor and can be used for energy storage, frequency compensation, buffering, filtering, and bypass applications. It has a capacitance of 47 μF, ±20% tolerance, a voltage rating of 400V DC, and an ESR of 7.28 mΩ. It further has a temperature range of -55℃ to 105 ℃

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