T491C474M050ZTAC00

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

T491C474M050ZTAC00 application field and working principle

Tantalum capacitors are an essential component in the electronics industry. They are used for many applications such as timing, voltage regulation, transient protection, switching, power management and analog signal filtering. The T491C474M050ZTAC00 is an example of a tantalum capacitor and provides excellent performance in low temperature and high frequency applications. The following article will discuss the application field and working principle of the T491C474M050ZTAC00.

Application Field

The T491C474M050ZTAC00 is a surface mount casing tantalum capacitor which is designed for high-frequency applications in low-temperature operations. It has a capacitance of 47µF and a voltage of 50V and comes in a 0805 case size. The capacitor has a high ripple current rating of 1.7A, meaning it can supply the current needed for large digital power systems. The capacitor can also operate successfully at high voltage levels and frequencies, making it suitable for Pulse Width Modulated (PWM) controllers and other power conversion tasks. The capacitor also features a low equivalent series inductance (ESL) and a low equivalent series resistance (ESR) which are aimed to reduce ripple current noise and to improve the regulatory behavior of the capacitor. The T491C474M050ZTAC00 is ideally suited for use in critical high temperature power supply designs.

Working Principle

Tantalum capacitors work through the principle of electrolysis, where a layer of oxidized material builds up on one side when current is passed through an appropriate liquid material. The buildup results in a dielectric layer separating electrodes which, in effect, creates a storage cell for electricity. The T491C474M050ZTAC00 uses a solid manganese dioxide (MnO2) electrolyte which is applied directly onto one side of the capacitor. This creates a molecular barrier that prevents further oxidation and allows the capacitor to retain its charge indefinitely. The capacitor also includes an internal overvoltage protection scheme which helps to protect against surges in current, and a series of safety devices that can prevent catastrophic failure.

In addition to the above, the capacitor requires an external resistor (also known as Current Limiting Resistor) to be placed across its terminals. The resistor limits the inrush of current, which helps to ensure that the capacitor remains within its safe operating range. The resistor should be of the same value as the capacitance and must also be able to handle the current that is running through it.

The overall performance of the capacitor also depends on its packaging, which affects its temperature rating, physical size and power dissipating capability. The T491C474M050ZTAC00 has an operating temperature range of -55˚C to +125˚C, a power dissipation of 1W and a self-restoration time of 15ms, making it ideal for use in high temperature and high power applications.

Conclusion

The T491C474M050ZTAC00 is an excellent example of a modern tantalum capacitor that can provide excellent performance in low temperature and high frequency applications. Its features, including its solid MnO2 electrolyte and its internal over-voltage protection scheme, make it ideal for powering digital devices, PWM controllers and other high-power applications. Furthermore, its external resistor limit inrush current and helps to ensure that the capacitor remains within its safe operating parameters.

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