T491B475K016AT Capacitors

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Tantalum capacitors are an important component in many electronics today. They are an ideal choice for many different applications, from high power applications to low power requirements. The T491B475K016AT, one of the most popular tantalum capacitors, is no exception.

The T491B475K016AT or T491 for short is a 0.476” diameter capacitor of 47µF with a rated voltage of 16V. It is an axial tantalum capacitor with a Molded Case, and a polarity of Anode marking +. The capacitor has an ESR rating of 0.025Ω for its capacitance value, commonly used for suppression and decoupling applications.

In its most typical application, the T491 is used as a bypass capacitor in the power supply side, typically coupled with low ESR and high ripple current solutions. It is ideal for high speed switching applications, due to its very low ESR and ripple current rating. It also ensures fast transient response and a low impedance path to ground. As such, it is ideal for use as an input bypass capacitor, as it can help reduce noise on the power input side.

Its working principle is relatively straightforward. The capacitor stores energy within its electric field, until the stored energy is released again in the form of electric current. This current is the result of an electrical charge which is held between two metal plates: the anode and the cathode. These plates are separated by an insulating layer of tantalum oxide, which creates a dielectric capacitor.

The capacitor can be constructed in different ways, with additions such as connective rods or a sleeve, depending on the precursor and desired finish. The T491, for example, is designed with a molded case, which helps to reduce both ESR and inductance levels, thus increasing its efficiency.

In addition, the capacitor can be used in various scenarios, including input filters, decoupling networks, audio amplifiers, and low power frequency synthesizers. The low ESR rating and ability to produce a fast transient response makes it an ideal choice for applications that require a larger capacitance more than 10µF.

Overall, the T491B475K016AT is a large tantalum capacitor that offers excellent current capacity and fast transient response. Its small size means it can be used in a variety of applications and its reliability makes it one of the most widely used capacitors in the world today.

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