T543B106M025ATW1007280

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Tantalum-polymer capacitors are widely used in a variety of electronic applications, from aerospace to consumer electronic applications. This article discusses the application field and working principle of the T543B106M025ATW1007280, a popular model of these capacitors.

Description

The T543B106M025ATW1007280 is a tantalum-polymer, radial-lead capacitor manufactured by KEMET electronics. It is a type of, also referred to as tantalum-polymer electrolytic capacitors (or solid tantalum capacitors). It operates with capacitance values ranging from 10uF to 10kF, can withstand operating voltages up to 50V and temperatures ranging from -55°C to +125°C.

Application Field

Tantalum-polymer capacitors are seen most often in industrial and consumer electronics applications. In industrial applications, these capacitors are seen in switchmode power supplies, circuit boards, power semiconductors, and motor controls. The ultra-small size of these capacitors and their high reliability has made them highly sought after in the electronics industry, where miniaturization is key.

In consumer electronics, they are often used as a buffering buffer in signal amplifiers, as power smoothing in power supplies, and as a filtering capacitor in signal conditioning applications such as radio waves, DSL, and cable modems. They are also great for high frequency logic applications because of their high Q, low ESR, and low combined series and shunt inductances.

Working Principle

The T543B106M025ATW1007280 is an electrolytic capacitor and works very similarly to other types of electrolytic capacitors. It functions by having two electrodes immersed in an electrolyte solution. The positive electrode has a thin layer of tantalum pentoxide, which acts as a dielectric, as well as a thin film of polymer. When a potential difference is applied between the two electrodes, an electric field builds up which causes charges to be stored on the capacitor.

The electrolyte solution (or “gel”) also helps to increase the capacitance of the capacitor. This is because the electrolyte creates a capacitive double layer where the capacitor is charged by the electrolyte and stores the charge when no current is present. This leads to a higher capacitance than would be possible without the electrolyte.

Due to the thinness of the dielectric, these types of capacitors have the advantage of having a much lower leakage current than other electrolytic capacitors. This makes them well-suited for high frequency applications where the current must pass through many times before the capacitor discharges.

Conclusion

The T543B106M025ATW1007280 is a popular tantalum-polymer capacitor due its small size, high reliability, and ability to withstand a wide range of temperatures and voltage levels. It is most commonly used in industrial and consumer electronic applications where miniaturization is key. It functions in a manner similar to other electrolytic capacitors, by having two electrodes in an electrolytic solution, where an electric field stores charges on the capacitor.

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