UWH1E221MCL1GS Capacitors

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Aluminum Electrolytic Capacitors

Aluminum electrolytic capacitors are polarized capacitors with a typical capacitance that ranges from several µF to several thousand µF. They are widely applied in various electronic circuits, from low voltage to high voltage analog circuits, to switch mode power supplies.

UWH1E221MCL1GS

UWH1E221MCL1GS is an aluminum electrolytic capacitor that is widely used in various application fields. It is a low impedance, low impedance model with a low leakage current that is suitable for use in high frequency circuits, such as in radio frequency (RF) applications. This capacitor features a maximum capacitance of 2.2 µF, a maximum operating voltage rating of 16 V DC, and a temperature range of -40°C to +105°C.

Application Field

UWH1E221MCL1GS is well suited for use as a bypass capacitor or general power supply filter capacitor in various electronic applications. It is suitable for various audio/video applications, including LCD TVs, DVD players, car entertainment systems, VCRs, and amplifiers. These capacitors can also be used as snubber capacitors in various switch mode power supplies.

Working Principle

Aluminum electrolytic capacitors are made up of a layer of aluminum oxide (Al2O3), which acts as an insulating layer, and a cathode plate (an anode plate being the second plate). The aluminum oxide insulating layer is formed through an anodization process in which an anode rod is placed inside an electrolyte solution, and an electric current is passed through it. This process causes a layer of aluminum oxide to be formed on the surface of the anode rod, forming the insulating layer. The aluminum oxide layer acts as an electrical insulator between the anode and cathode, creating an electrical capacitor.

The cathode plate is then connected to the anode by a dielectric electrolyte, typically an organic solvent, such as an ester or a glycol. The electrolyte is also connected to a negative electrode, which is usually made from a metal such as aluminum or tantalum. This connection between the electrolyte and the negative electrode causes an electrical current to flow from the cathode to the anode. This current forces the charges on the anode and cathode plates to repel each other, and the resultant electrostatic force is what creates the capacitance of the aluminum electrolytic capacitor.

In order to increase the amount of capacitance of the aluminum electrolytic capacitor, the layers of aluminum oxide may be multiple and separated by different dielectrics. This also helps to reduce the amount of leakage current and increase the life of the capacitor. Additionally, the dielectric may be a specialized material such as a polyester, polypropylene, or polycarbonate, which increases the temperature rating, voltage rating, and overall performance of the capacitor.

Conclusion

UWH1E221MCL1GS is an aluminum electrolytic capacitor with a low impedance, low leakage current, and a maximum capacitance of 2.2 µF. It is suitable for use as a bypass capacitor or general power supply filter capacitor in various high frequency and audio/video applications. This capacitor is also capable of withstanding temperatures up to 105°C and can be used as snubber capacitors in various switch mode power supplies. The working principle of aluminum electrolytic capacitors involves the formation of an insulating layer of aluminum oxide, the connection of the cathode and anode plates, and the repulsion of charges, which creates the capacitance.

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