SK220M400ST

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Aluminum electrolytic capacitors are essential components for radio and electronic equipment because of their high capacity for storing electrical energy in a limited volume. These capacitors are constructed of aluminum with a thin film of oxide deposited on one of the electrodes and filled with an electrolytic solution. The SK220M400ST aluminum electrolytic capacitor has a maximum voltage of 400 Volts and a capacitance of 220-μF. It is a large diameter, long life capacitor with a 105°C maximum temperature rating.

Applications for the SK220M400ST aluminum electrolytic capacitor include electric discharge lighting, power supplies,and welding rectifiers. Its characteristics make it highly suited for filtering noise and ripple from 50/60 Hz AC power inputs. It can also be used in surge current suppression circuits and power supply smoothing circuits.

The SK220M400ST aluminum electrolytic capacitor has a radial, epoxy-dipped terminal construction. Its axial construction is non-inductive, which makes it suitable for applications with high current pulses. The SK220M400ST capacitor also has higher insulation resistance than other types of capacitors, making it less prone to leakage. The capacitor is also highly reliable and has a long life even in the most demanding applications.

The working principle of an aluminum electrolytic capacitor is based on making use of the electrical characteristics of the oxide layer formed on the surface of the aluminum foil. When an electric field is applied to the surface of the aluminum foil, electrons move toward the surface of the aluminum foil which increases the positive charge and forms a layer of positive ions on the surface. At the same time, the negative ions in the electrolyte also move to the surface of the aluminum foil and form a capacitive insulation layer with the positive ions to create a symmetrical electric field. This electric field in turn maintains the separation of charge on each side of the oxide layer and stores electrical energy inside the capacitor.

The SK220M400ST aluminum electrolytic capacitor is an excellent choice for high voltage, surge current, and power supply smoothing applications. It is highly reliable and has a long life. Its radial and axial construction can be tailored to fit a variety of electronics applications. Its high insulation resistance makes it less prone to leakage and its non-inductive construction makes it highly suited for high current pulses.

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