T491B474K035AT2478

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Tantalum Capacitors

T491B474K035AT2478 is a type of tantalum capacitor. It belongs to a larger category of non-polarized, surface-mount electrolytic capacitors. Tantalum capacitors are composed of a tantalum anode and a manganese dioxide cathode. The two plates are separated by a dielectric layer and sealed in an epoxy case.

Applications of T491B474K035AT2478

T491B474K035AT2478, due to its small size, surface-mount nature, excellent endurance, and low cost, is widely used in many fields such as aerospace, industrial automation, medical electronics, and consumer electronics. It is also used in various control circuits and power supplies, as well as in switching regulators and voltage converters. In addition to these, tantalum capacitors are also used in high-frequency design, automotive applications, communication systems and computers.

Working Principle

T491B474K035AT2478 utilizes two plates, one anode and one cathode, separated by a dielectric or insulator layer. When an electric voltage is applied to the capacitor, an electrostatic charge is built up in the dielectric layer and stored between the two metal plates. The amount of charge stored in the dielectric layer is determined by the value of the capacitor and its ability to store a charge, known as capacitance.

When a voltage is applied, the charge in the capacitor is constantly oscillating due to current flowing through the capacitor. As the current increases, the capacitor stores more of the charge, creating a voltage curve. When the current drops, the capacitance decreases. This process continues as long as a voltage is applied.

The charge on the capacitor can be discharged through an electrical device such as a resistor. This process is known as discharge. A capacitor can also be charged or discharged quickly through a circuit, allowing it to accept and store a large amount of energy in a short period of time.

T491B474K035AT2478 capacitors are constructed with a very thin insulator, allowing them to attain a very large capacitance. This makes them excellent for high-frequency designs, as they can store and discharge quickly. Due to their small size and surface-mount nature, they can also be used in space-restricted applications.

Advantages and Disadvantages

Tantalum capacitors have several advantages. They offer excellent temperature stability and have a wide operational temperature range. They also offer high-frequency performance and can be used in space-restricted applications. Furthermore, they are relatively inexpensive, non-polarized, and have good volumetric efficiency.

Tantalum capacitors also have some disadvantages. They have a high self-resonance frequency, meaning they tend to "sing" or create spontaneous oscillations when used in high-frequency applications. They also have poor mechanical shock and vibration resistance and relatively low capacitance compared to other types of capacitors. Finally, they do not work well with high-frequency signals, meaning they cannot be used in applications such as RF circuits.

Conclusion

T491B474K035AT2478 is a type of tantalum capacitor that is widely used in many fields due to its small size, surface-mount nature, excellent endurance, and low cost. It utilizes two plates, one anode and one cathode, separated by a dielectric layer in order to store a charge. It has some advantages, such as excellent temperature stability and high-frequency performance, as well as some disadvantages, such as high self-resonance frequency and poor mechanical shock and vibration resistance.

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