T97R476M035ESB

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Tantalum Capacitors

Tantalum capacitors have various ranges with unique features, making them a vital component in many electronic applications. A T97R476M035ESB tantalum capacitor is one such device, designed to operate in different applications and with different working principles.

Application Field

T97R476M035ESB capacitors are generally used in telecommunications, consumer audio-visual electronics and automotive electronics. The range is especially suitable for controlling the signal supply of digital circuits in those industries. This range is capable of offering exceptional de-rating performance at increased temperatures and high stability. Other applications of the T97R476M035ESB range include power supply circuits for DC/DC converters, and for maintaining the stability of the electrical signal in anti-lock brake, electronic fuel injection and cruise control systems in modern automobiles.

Working principle

Tantalum capacitors use a very thin layer of the electrically insulating tantalum pentoxide between two conducting electrodes. The desired capacitance value is largely dependent on the surface area of the electrodes and the thickness of the tantalum pentoxide layer between them. The capacitance value is further affected by the material used for the electrodes and the operating environmental conditions.

When the capcitor is in use, the electric charge on the electrodes causes an electric field, resulting in the flow of electric current. This current generates heat inside the capacitor. To prevent overheating of the capacitor, tantalum capacitors are fitted with an in-built temperature compensation mechanism. This ensures that the capacitance performance remains stable under varying temperature conditions.

When power is applied to the capacitor, there is an immediate rush of current, which is absorbed and stored in the tantalum dielectric layer. This stored energy can be slowly discharged, allowing the capacitor to exhibit high-pulse current capabilities. These high-pulse current capabilities are particularly useful in applications such as automotive electronic systems, which require sudden discharge of energy.

Tantalum capacitors offer much better performance than standard electrolytic and film capacitors. They can even handle ripple currents up to ten times higher than what standard electrolytic capacitors offer, making them ideal for power supply applications. Keep in mind however, that tantalum capacitors are polarized, meaning that they need to be connected in the proper direction in order to function correctly.

Tantalum capacitors provide a unique combination of high capacitance, low ESR, good stability, and very long life. Proper maintenance and usage are essential for achieving maximum performance with this type of capacitor, and special attention should be given to the actual application in order to ensure that the capacitor is suitable and that suitable operating conditions are maintained throughout the life of the device.

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