SXR121M035ST

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors, also known as \'electrolytic caps\' or simply \'electrolytics\', are capacitors whose anode electrodes consists of a metal layer that has been oxidized to form a very thin insulating layer. An electrolyte, typically an acid solution in most standard capacitors, permits the passage of electrical current between the electrodes when a voltage is applied across them. As such, electrolytic capacitors provide very high capacitance values in a very small volume, often at a relatively low cost.

SXR121M035ST Application Field and Working Principle

SXR121M035ST Aluminum electrolytic capacitors are commonly used in circuits involving high-voltage AC or DC applications. These capacitors find particularly widespread use in power supplies, where they offer a high capacitance-per-unit-volume value as well as excellent electrical characteristics capable of withstanding wide temperature ranges and very high alternating voltages.

In general, the capacitance of an electrolytic capacitor is directly proportional to the surface area of the anode. Larger capacitors with higher anode surface areas therefore tend to have greater capacitance than smaller capacitors. This is why electrolytic capacitors typically come in larger sizes than other types of capacitors. In addition, the voltage rating of an electrolytic capacitor is also directly related to the anode surface area, which means that electrolytic capacitors can generally use higher voltages than other capacitor types.

The working principle of any electrolytic capacitor is essentially the same, with only the size and materials used in its construction being the primary variables. In essence, when an alternating voltage is applied across the capacitor, an electric current passes through the electrolyte between the cathode and anode electrodes. This electric current is then used to charge up the capacitor until the electric field is large enough to break down the insulation between the electrodes. The result is a capacitance of the capacitor, in which the capacitance is proportional to the surface area of the electrodes.

Overall, SXR121M035ST Aluminum electrolytic capacitors are ideal for high voltage AC or DC applications in which a high capacitance-per-unit-volume value is desired. This makes them well-suited for use in power supplies, as they offer low loss, wide temperature range capability, and very high alternating voltages.

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