T491A105M025AT4659

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Tantalum capacitors are among the most widely used type of capacitor. The T491A105M025AT4659 is a well-known product within the tantalum capacitor range.

A capacitor is a device that stores energy in the form of an electric field. All capacitors support the flow of current and are made of two conductors separated by an insulating material known as a dielectric. In a tantalum capacitor, the dielectric is a solid electrolyte made of Tantalum Pentoxide. The solid electrolyte layer provides an excellent solution for storing high capacitance values in a small size. The name of a tantalum capacitor is typically made up of a combination of letters and numbers which indicate the capacitance, resistance and voltage ratings of the device.

The T491A105M025AT4659 is a radial leaded, surface mount capacitor with a rated voltage of 25V and a capacitance of 105μF. The “T491A” section of the name indicates that this is a conventional tantalum capacitor. The “M” in the name indicates the rated voltage of 25V, the first two digits following “M” (10) indicate the capacitance measurement of 105μF and the remaining digits (05, A) indicate temperature and tolerances. The AT4659 is part of the RoHS compliant T491 Series.

Applications for T491A105M025AT4659 are typically in circuits where low-ESR (Equivalent Series Resistance) and high capacitance values are desired. Compared to other capacitors, this tantalum capacitor has a higher volumetric performance and a smaller footprint, making it a good choice for high density circuit applications. It is also more reliable than other types of traditional (electrolytic) capacitors and is less prone to failure.

The working principle of a tantalum capacitor is the same as that of any other type of capacitor. When an external voltage is applied to the capacitor electrodes, an electric field is developed between the two electrodes, allowing current to flow through the capacitor. This creates an electric field within the dielectric material which opposes the applied voltage, thus dampening and controlling the current flow.

T491A105M025AT4659 capacitors are also used for buffering spikes and providing signal and power supply smoothing. Some of the other applications of tantalum capacitors include: decoupling, filtering, timing, and energy storage.

The T491A105M025AT4659 is an efficient and reliable small-sized capacitor that can provide high performance and low ESR in applications requiring high power and low leakage currents. With its low leakage current, low cost and high capacitance values in an extremely reduced footprint, this tantalum capacitor can be a great solution for achieving many of your power and signal conditioning requirements.

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