ELXM221VSN471MP45S

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Aluminum electrolytic capacitors, also known as ‘electrolytic’, are extensively used in a variety of electronic components due to their high dielectric strength and relatively low cost. ELXM221VSN471MP45S is a type of aluminum electrolytic capacitors manufactured by KEMET Corporation. Its applications and working principle are discussed in this article.

Application for ELXM221VSN471MP45S

ELXM221VSN471MP45S aluminum electrolytic capacitors are mainly used in power supplies and filtering applications to improve the conversion efficiency and optimize the stability of the output voltage. It is a polarized capacitor, meaning that one of the leads (+) is always the anode and the other (-) is the cathode. The capacitor is designed for discrete application requiring from 10 to 1000 microfarad capacitance range with 5.4mm to 25.5mm diameter. Due to their low dissipation factor, low ESR and wide capacitance range, ELXM221VSN471MP45S also used in automotive, lighting illumination, and low voltage power conversion applications.

Working Principle of ELXM221VSN471MP45S

The ELXM221VSN471MP45S aluminum electrolytic capacitors use a thin oxide film to form a dielectric layer between two aluminum electrodes. The working principle of these capacitors is based on the electrolytic action between two dissimilar metal electrodes in an electrolytic solution. When a voltage is applied across the capacitor, electrons flow through the electrolyte solution, forming anodic and cathodic layers on the aluminum electrodes. The dielectric oxide layer thus formed acts as an insulator between the two layers.

ELXM221VSN471MP45S aluminum electrolytic capacitors have higher capacitance values and longer cycle life compared to other types of capacitors. The capacitance of the capacitor depends on the area of the electrodes and the thickness of the dielectric layer, which is a function of the applied voltage. When the voltage is exceeded, the capacitance of the capacitor decreases exponentially. The capacitance may also change with temperature, humidity, and frequency of the applied voltage.

Conclusion

In conclusion, ELXM221VSN471MP45S aluminum electrolytic capacitors are widely used as discrete components in power supplies and filtering applications to improve the conversion efficiency and optimize the stability of the output voltage. Its polarized structure features an anode and a cathode, which form a dielectric oxide layer between them when a voltage is applied across the capacitor. The capacitance of the capacitor depends on the area of the electrodes and the thickness of the dielectric layer, which is a function of the applied voltage.

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