T491B684K035AT Capacitors

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Tantalum Capacitors

T491B684K035AT capacitors, also known as tantalum capacitors, are a type of capacitor characterized by their construction in which tantalum powder is compressed into a pellet, and then coated with a manganese dioxide dielectric and covered with a metal shell. This coating is applied to enhance the capacitor’s ability to store energy, making it a highly efficient energy storage device. The main advantage of using this type of capacitor is that it is able to achieve a higher capacitance than a traditional dielectric capacitor of the same volume.

Applications

T491B684K035AT capacitors are widely used in electronic circuits, such as in portable electronics, cell phones and laptop computers. The tantalum capacitor is often used as an alternative to electrolytic capacitors as it does not suffer from the same life expectancy limitations as these traditional types of capacitors. They can also be used for critical timing and filtering applications in audio equipment, as well as in automotive applications such as in the ignition system.

Working Principle

The working principle of the tantalum capacitor can be explained by looking at its construction. Unlike traditional dielectric capacitors, tantalum capacitors are built using a compressed tantalum powder that acts as both the anode and dielectric medium at the same time. When a voltage is applied, the tantalum powder compresses, allowing the electrons to flow through. When the electrons stop flowing, the capacitor is in its discharged state and is ready to hold energy again.

Tantalum capacitors have the ability to store a large amount of energy, making them excellent for timing and filtering operations. Thanks to their slip tolerance, they are also excellent in applications that require their capacitance to remain relatively constant over varying temperatures.

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