EKZE630ETS681MM20S

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Aluminum electrolytic capacitors are widely used in electronic circuits as energy storage devices. The EKZE630ETS681MM20S belongs to this family. It is an electrolytic capacitor of 20V/630uF with low impedance, long life, and high temperature resistance. Herein, this capacitors’ application field and working principle will be discussed.

Application Field

The EKZE630ETS681MM20S is mainly used in switch power supplies, power amplifiers, audio circuits, and automotive electronics. This is because it has substantial advantages over other capacitor types, such as its low impedance and high temperature resistance. As a result, it prevents harmonic distortion to the audio and the potential of unwanted output from the power supply.

It is also primarily used in power inverters, where it stores energy for powering motor motion. With its low leakage current and wide capacitance, it can provide the necessary power to the motor continuously. Additionally, it can be used as a filter in electronic circuits to prevent the undesirable radio-frequency interference (RFI) that may come from external signals.

Working Principle

Aluminum electrolytic capacitors, like the EKZE630ETS681MM20S, are constructed with two concentric aluminum cylinders. One is considered as the positive electrode and the other is negative electrode. The positive electrode is wrapped with an insulating material that seals it, and between them there is an electrolyte. When a voltage is applied, positive ions are generated from the electrolyte, that move towards the cathode and accumulate there.

When the capacitor is charged, current enters the positive electrode which releases electrons leaving the electrode with a shortage of them. That results in a positive charge on the electrode. At the same time, the negative electrode starts to accumulate electrons leading to a negative charge. This difference of charges creates an electric field on the capacitor.

The value of the capacitance depends on the kind of dielectric and its thickness. In this case, the dielectric is the electrolyte, and the higher the pressure exerted on it, the bigger its capacitance. This way, aluminum electrolytic capacitors have higher capacitance per unit of volume when compared with other type of capacitors.

Conclusion

In conclusion, the EKZE630ETS681MM20S belongs to the family of aluminum electrolytic capacitors, and is particularly designed to handle 20V/630uF processes. Its main applications are in switch power supplies, power amplifiers, audio circuits, automotive electronics, power inverters, and electronic filter circuits. Additionally, its working principle is based on the pressure of the electrolyte between two concentric aluminum cylinders, letting the positive one accumulate a positive charge, and the negative one acquire a negative charge, creating an electric field.

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