EEF-UE0J221R Capacitors

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Aluminum - Polymer Capacitors

Aluminum-polymer capacitors, also known as aluminum solid electrolytic capacitors, are capacitors with an anode made of aluminum foil with an etched surface and an electrolyte system based on conductive polymers. These capacitors are very versatile and offer excellent electrical features of low equivalent series resistance (ESR), long expected lifetimes, high ripple current ratings and a large capacitance range for high density applications. The EEF-UE0J221R is an aluminum-polymer surface-mount capacitor from Panasonics\'s GSX series.

Applications

EEF-UE0J221R aluminum-polymer capacitors have a wide range of applications in automotive, automotive audio, communication systems and consumer cell phones. Due to their high levels of reliability and performance, they are often used in power conversion, filtering, decoupling and high-frequency circuit applications. Because of their low equivalent series resistance (ESR), they are particularly well-suited for applications that require high ripple current ratings and low-frequency circuits. These capacitors are also well-suited for high temperature environments.

Working Principle

The working principle of the aluminum-polymer capacitor is based on a mechanism that enables formation of a conductive polymer layer on its anode. This effect is known as the field-induced morphology change. A small electric field is applied to the anode and a thin film of conductive polymer forms on its surface. This conductive polymer layer acts as an electrolyte and the capacitor becomes able to work. The thickness of the polymer layer is proportional to the applied electric field strength.

Due to the thin layers of polymer on the anode, the equivalent series resistance (ESR) of the capacitor is much lower than that of an aluminum electrolytic capacitor. This enables higher ripple current ratings and improved thermal performance. Aluminum-polymer capacitors have very low ESR and provide good filtering and decoupling performance at high frequencies. This makes them ideal for high frequency and low-frequency circuits.

Conclusion

The EEF-UE0J221R aluminum-polymer capacitor is an ideal choice for environments with demanding electrical specifications. They offer excellent electrical features of low ESR, long expected lifetimes, high ripple current ratings and a wide capacitance range for high-density applications. Additionally, these capacitors have a wide range of applications in automotive, automotive audio, consumer cellular phones, and communications systems due to their high levels of reliability and performance. They are also well-suited for high temperature environments due to their low ESR and are particularly well-suited for applications that require high ripple current ratings and low-frequency circuits.

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