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Tantalum Capacitors

A tantalum capacitor, also known as a tantalum-elecrolytic capacitor, is an electrolytic capacitor, consisting of two electrodes–cathode and anode– typically separated by a dielectric material commonly made of tantalum pentoxide (Ta2O5). The capacitor has a relatively small size and high capacitance value (CWR26KC106KBGB\HR). A tantalum capacitor is used to store electrical charge, releasing it back to the circuit when needed.

Application Field and Working Principle

Tantalum capacitors are used in a wide range of industries, including automotive, power supplies, consumer electronics, military, and medical applications. In automotive applications, they are often used to produce electrical current from the battery to power various units, such as the fuel pump and the starter motor. They are also used in complex audio systems designed to reduce sound distortion.

In power supply applications, they can be used to store electrical charge for starting and stopping the main power supply, or providing additional power to peak loads. In consumer electronics, they can be used to filter noise from radio and television signals. In military and medical applications, they are usually used for power conditioning or signal filtering circuits.

Tantalum capacitors consist of two electrodes, separated by an electrolyte. The positive electrode is typically made of aluminum or steel, and the negative electrode is made of tantalum. The electrolyte is made of a solution of tantalum pentoxide or other compounds. One of the electrodes is connected to the power line which supplies the electrical current, while the other electrode is connected to ground. When the potential difference between the two electrodes is enough, the capacitor stores electrical charge on its negative electrode in proportion to the potential difference.

When the external current is turned off, the capacitor can discharge the stored electrical charge back into the circuit. The discharge time depends on the capacitance value, the circuit resistance, and the load voltage. The rate of discharge also depends on the temperature of the capacitor, and the higher the temperature, the faster the capacitor will discharge.

Tantalum capacitors are generally reliable and can operate over a wide temperature range, making them suitable for many applications. They are also relatively low cost and have relatively high capacitance values, making them a popular choice for power electronic applications.

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