LKG2A821MESZBK

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Aluminum Electrolytic Capacitors

An aluminum electrolytic capacitor, also known as ‘electrolytic capacitors’, is an electronic component commonly used in many electrical circuit designs. LKG2A821MESZBK represents one such aluminum electrolytic capacitor.

Application Field of LKG2A821MESZBK

The capacitor is used in various applications such as, DC-DC and AC-DC power supply filtering, energy-storage guzzler, as a custom capacitor for two-way radio, power and audio amplifier equipment, high-frequency power supply smoothing capacitor and inertial bus and computer circuit. Besides, it is applied in consumer-electronics, automotive, home appliances, data storage devices and digital cameras.

Working Principle of LKG2A821MESZBK

An aluminum electrolytic capacitor basically consists of an anode made of aluminum foil and a cathode made of either a porous sintered plate type or non-solid electrolyte, along with some nonconductive separator layer. The capacitor is then filled with an electrolyte such as ethylene glycol and other special additives.

The anode has a thin layer of oxide which acts as the dielectric barrier between it and the electrolyte. When the capacitor is subjected to an electric current, the positive ions from the electrolyte gets attracted towards the anode and the negative ions get repelled towards the cathode. This results in the accumulation of opposite charges, thus creating an electric field between the electrodes, which gets stored in the form of energy.

When the capacitor is capable of accepting current, i.e when a voltage is first applied, the majority of electric field in the capacitor is as a result of the ions attracted by the anode. As the voltage is increased, the ions start to form a conductive conduction path, through which the majority of electric field is generated.

This, in turn, produces an equivalent charge stored in the capacitor. As current is delivered from the capacitor, the equivalent charge reduces and the capacitor\'s impedance increases.

Since the oxide layer does not contain any free electrons, it doesn’t allow the current to flow directly from one side to the other, so the current is kept apart, thus providing an excellent electric insulation between the anode and the electrolyte.

Conclusion

LKG2A821MESZBK is a reliable aluminum electrolytic capacitor used in various applications. It utilizes an oxide layer as the dielectric barrier and relies on the opposite attraction of positive and negative ions to generate the electric field. This is how the capacitor stores energy, which can be released when the voltage is applied in the opposite direction to feel its capacity.

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