SEK220M063ST

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Aluminum electrolytic capacitors, also known as electrolytic capacitors, are polarized capacitors with a large capacitance. The SEK220M063ST is a part of a range such as the 220V series, where the commonly used FE85 plastic shells are adopted, and the reliable and popular ES safety certification structure is adopted. It is very popular in the fields of aviation, aerospace, communications and defense.

Application Field of SEK220M063ST

The SEK220M063ST is a vacuum-dried aluminum electrolytic capacitor with non-solid electrolyte. This means that it allows for extremely high capacitance values and low equivalent series resistance (ESR). It is designed to withstand high working voltages of up to 220V, making it ideal for a wide range of applications.

The SEK220M063ST capacitor is primarily used for electronic energy storage, power conditioning, motor start and run applications, motor decoupling for thrusters and robotic arms, and active cooling for PCBs.

The capacitor has proven to be reliable and high performing in areas where power conditions require higher voltage than what can be typically provided, such as in telecoms, medical instrumentation, automobiles, military equipment and aerospace. It is also used in inverters, switching regulators and SMPS, as well as in high-voltage DC-DC converters.

Working Principle of SEK220M063ST

The SEK220M063ST is a non-solid aluminum electrolytic capacitor, made of two aluminum foils with a paper separator impregnated with liquid electrolyte, a cylinder body and end plate. The end plates are connected to the anode and the cathode electrodes, respectively.

When a voltage (or potential) is applied on the capacitor plates, the voltage causes the electrons to flow from the anode to the cathode, in a process called electrolytic action. The current flow through the liquid electrolyte causes the electrodes to polarize and thus, a capacitor is formed.

The oxide deposited layers on the aluminum foils also act as insulator, which makes the capacitor self-healing in the event of flashover and also helps maintain the capacitance even at high temperatures. This gives the capacitor stability over time and helps protect the desired circuit from heat, high volts, and any ESD.

The size of the electrical field in the capacitor increases based on the applied voltage, which drives ions to the electrodes and causes a current flow. The more the charge accumulates on the electrodes, the more the dielectric increases. As the opposed charges accumulate on the plates, an electrostatic field is formed and the capacitor stores energy.

When the voltage applied on each plate is equal but opposite in sign, the plates become discharged and the stored energy is released.

Conclusion

The SEK220M063ST aluminum electrolytic capacitor is designed for high-voltage applications, such as those requiring 220V of power. The capacitor is reliable and offers excellent performance, making it suitable for a wide range of applications such as telecoms, medical instrumentation, automobiles, military equipment and aerospace. The SEK220M063ST works on the principle of electrolytic action, where the current flow through the liquid electrolyte causes the electrodes to polarize to form a capacitor that is capable of storing energy.

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