T491D336K025AT4280

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Tantalum Capacitors

Tantalum capacitors, also known as tantalum electrolytic capacitors, are a type of electrolytic capacitor, a component of electronic circuits. They are composed of tantalum metal which acts as an anode, covered by an oxide layer which acts as the dielectric, and finally covered by a conductive cathode. This combination makes them voltage-dependent and relativley small and inexpensive.

The T491D336K025AT4280 is an example of a tantalum capacitor that is used in various applications. It has a capacitance of 33 µF, a maximum operating temperature of 85°C, a rated voltage of 25V, and a tolerance of ±20%. It has a ESR rating of 3.3 ohms and a maximum ripple current of 475 mA. These specifications make it an ideal choice for many different applications.

Applications

The T491D336K025AT4280 is used in a wide variety of applications, such as automotive, telecom, power supply, medical, and consumer electronics. These capacitors are used for energy storage in DC-DC converters, motor drive circuits, AC-DC convertors, and power supplies. It can also be used as a decoupling and noise-filtering device in computer equipment as well as for filtering signals.

Working Principle

A tantalum capacitor works on the principle of capacitance. When a voltage difference is applied across its two terminals, it stores charge. This process is known as charging. The process is reversed when the voltage across its terminals is reduced and it releases charge. This process is known as discharging. The capacitance of a tantalum capacitor is inversely proportional to the amount of charge stored, and therefore the voltage applied across its terminals.

When a tantalum capacitor is in the process of charging or discharging, electric current flows through it. This process results in the thin layer of oxidation on its anode to build up. Over time, this oxidation layer forms a barrier that increases resistance and reduces capacitance. This phenomenon is called self-discharge or leakage current and it is the major limitation of these capacitors.

To overcome this problem, manufacturers use several techniques such as coating the electrode with a thicker layer of oxide or reducing the size of the electrodes. The addition of a wetting agent also reduces leakage current, as it interacts with the oxide layer and reduces its impedance.

Conclusion

The T491D336K025AT4280 is an example of a tantalum capacitor that is used for various applications. Its ratings make it suitable for many applications such as in DC-DC converters, motor drive circuits, AC-DC convertors, and power supplies. This capacitor works on the principle of capacitance and electric current flows through it during charging and discharging. Capacitors are prone to self-discharge or leakage current due to the formation of a thin barrier on its anode, but manufacturers use several techniques to reduce this effect.

The specific data is subject to PDF, and the above content is for reference