T491C475M035AT4380

T491C475M035AT4380 Application Field and Working Principle

T491C475M035AT4380 is a type of tantalum capacitor, which is widely used for power supply and decoupling applications. The main advantage of using this type of capacitor is its low ESR (Equivalent Series Resistance) and the high volumetric efficiency. It also has a long life and high temperature / humidity stability. This type of capacitor is ideal for board level power supply and decoupling, as well as for high-frequency applications.

A tantalum capacitor consists of a tantalum anode, a manganese dioxide (MnO2) cathode and an electrolyte. The anode is made of tantalum and the cathode is coated with manganese dioxide, which acts as the electrolyte. The anode and cathode are separated by a thin layer of tantalum pentoxide, which acts as the dielectric. The dielectric layer is extremely thin, allowing high voltage operation and minimal leakage current. The overall structure of the tantalum capacitor is similar to that of a ceramic chip capacitor.

The working principle of a tantalum capacitor is based on the electrostatic principle. When a voltage is applied between the anode and the cathode, the electrons release electrons from the tantalum anode and migrate to the cathode. The dielectric barrier prevents the electrons from passing back to the anode and the electric field established across the dielectric creates an electric charge on both the anode and the cathode. This charge builds up over time and provides an output voltage across the capacitor.

The T491C475M035AT4380 is a surface mount, hermetically sealed capacitor. It has a 3-pin construction, which allows it to be used in a variety of applications including decoupling, filtering, timing, regulator stabilization and other low frequency control circuits. The capacitor is available in two capacitance values, 4.7µF and 6.3µF, and its rated voltage is 16 V (DC). The unique design of the capacitor allows it to be used in high altitude and high temperature applications, as well as in high humidity and corrosive environments. The maximum allowable capacitance tolerances of the capacitor are ±20%, and its leakage current varies from 0.5 to 5µA.

In conclusion, the T491C475M035AT4380 is a type of tantalum capacitor, which is widely used for power supply and decoupling applications. It is ideal for board level power supply and decoupling, as well as for high-frequency applications. The capacitor has a hermetically sealed construction and is available in two capacitance values, 4.7µF and 6.3µF, and its rated voltage is 16 V (DC). Additionally, it has high temperature / humidity stability, a long life and low ESR (Equivalent Series Resistance).