EEF-UD0D221ER

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Aluminum - Polymer Capacitors

Aluminum - Polymer Capacitors are widely used in various applications and fields due to their many advantages. Due to their low cost, high reliability, and small size, they are often used as DC-blocking capacitors, power supplies, and by-pass capacitors. The EEF-UD0D221ER application areas include telecommunications equipment, aerospace, and automotive applications.

Construction

Aluminum - polymer capacitors consist of two aluminum foils stacked against each other, separated by a dielectric material comprised of a film, usually Polyethylene Terephthalate (PET). The film acts as an insulator between the two foils when a voltage is applied. The foils are then held together by two conductive tabs and both are completely enclosed in an external shell made of plastic or other insulator material. The tabs provide electrical connection to the outside world. Due to their small size and mechanical design, they are often used in places where other capacitors will not fit.

Working Principle

Aluminum - polymer capacitors work by storing electrical charges and releasing them when needed. The application of a voltage across the two aluminum foils (the two terminals) creates an electric field that results in electrical charges building up on the two foils. As the voltage increases, the field strength increases, and the capacitance increases with it. At the same time, the dielectric material between the two foils keeps the charges from leaking and maintains the voltage applied to the capacitor.

Advantages

The main advantages of Aluminum-Polymer Capacitors are their long life, low ESR, and improved temperature performance. They are also much smaller and lighter than conventional capacitors, making them popular for applications where space and weight are of major concern. In addition, they have an excellent load life performance and a low dielectric absorption rate. Other advantages include high capacitance retention and low dielectric leakage currents, which helps to maintain stable performance.

Applications

Aluminum-Polymer Capacitors can be used in a variety of applications, including DC-blocking capacitors, power supplies, and by-pass capacitors. They are also often used for high frequency switching, noise suppression, and low noise output. They are ideal for communications, medical equipment, transportation systems, industrial controllers, and consumer electronic products.

Conclusion

Aluminum - Polymer Capacitors offer many advantages including low cost, high reliability, and smaller size. They are an ideal choice for a variety of applications, and can be used in a range of industries such as communications, medical equipment, and industrial controllers. The EEF-UD0D221ER application field and working principle are just two examples of why Aluminum-Polymer Capacitors are so useful.

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