Tantalum Capacitors

T495X687K004ZTE060 is a type of capacitors called tantalum capacitors, which are widely used in various industries, from daily consumer electronics to complex military and aerospace applications due to their ability to store electrical energy in a small ceramic body. In this article, we will discuss the application field and working principle of this type of capacitors.

Application Field

Tantalum capacitors, due to their small form factor and excellent performance, are widely used in many applications, such as military and aerospace applications, television and video equipment, telecommunications, computers, consumer electronics, automotive and industrial electronics, etc.

In military and aerospace applications, reliable and efficient operations are required, and tantalum capacitors can meet this requirement because of their low ESR (Equivalent Series Resistance) and low temperature coefficient. In addition, tantalum capacitors are often used in oscillators, filter circuits, and timing circuits in these applications because they can handle high temperature and high frequency operations with low distortion.

In television and video equipment, voltage supply applications such as power supplies and audio amplifiers require the use of low ESR capacitors to reduce power losses, filter out high frequencies (noise) for video transmission, and reduce voltage ripples to improve picture sharpness. Tantalum capacitors are ideal for these applications due to their low ESR and low ESR drift characteristics.

In telecommunications, tantalum capacitors are often used in high-speed signal processing applications such as modulators, demodulators, and transceivers. They also can be used in frequency mixers, filters, and DC blocking capacitors. These capacitors are also commonly used in cellular telephones, satellite-based systems, and other radio communications equipment.

Furthermore, by virtue of their high capacitance in a small size, Tantalum capacitors are also used in computer clock circuits, audio signal circuits, and voltage regulation circuits. Moreover, they can be used in consumer electronics, such as portable music players and cameras where power management is critical, as well as in automotive and industrial electronics, such as power supply circuits, high voltage circuits, and voltage controllers.

Working Principle

Tantalum capacitors are constructed using thin layers of conductive tantalum material, alternating with layers of insulating material, such as niobium oxide, titanium dioxide, and barium titanate. The construction of this capacitor is similar to that of a sandwiched metal-insulator-metal (MIM) capacitor, the dielectric layer between the two conducting layers provides the capacitance.

The capacitance of the tantalum capacitor comes from the fact that, when a DC voltage is applied across the two conductors, a small electric field is created which causes a charge separation between the electrodes. This charge separation creates an energy field, or dielectric, which is carried by the dielectric material between the two conductive plates. As the applied voltage increases, so does the charge separation and thus the capacitance.

The other important property of the tantalum capacitor is its low ESR, which is because of the nature of the conductive layer. The tantalum layer is etched with microscopic pores which are filled with a conducting liquid material, such as manganese dioxide, before the entire capacitor is sealed. This greatly reduces the contact resistance between the tantalum main conductor and the dielectric in the capacitor, resulting in a very low ESR.

Tantalum capacitors are also very reliable components, since they are more tolerant of high temperatures and are resistant to aging effects. In addition, they offer higher volumetric efficiency and can handle large pulses of current.

Conclusion

In conclusion, T495X687K004ZTE060 is a type of capacitors called tantalum capacitors which are widely used in military, aerospace, telecommunications, computer, consumer electronics, automotive and industrial electronics applications, due to their small form factor, excellent performance, low ESR, low temperature coefficient, high volumetric efficiency and ability to handle large pulses of current.