T520V477M2R5ASE009

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T520V477M2R5ASE009 is a type of tantalum - polymer capacitors, which consists of tantalum anode, layered dielectric and cathode with polymeric material. There are two kinds of constructions, with either radial leads or axial leads, which could be adapted depending on the application. In general, this type of capacitor offers extensive advantages compared to traditional tantalum capacitors based on foil construction.

Application field

T520V477M2R5ASE009 is widely used for various electronic applications, such as power supply, debugging systems, signal coupling, and decoupling, blocking and filtering, timing, and other applications. The advantages offered by these capacitors include extended life, higher temperature rating, lower ESR, a wide variety of capacitance values, and better tolerances availability.

Working Principle

The working principle of T520V477M2R5ASE009 is similar to traditional tantalum capacitors, in which the dielectric is formed by a thin layer of oxide between the anode and the cathode. However, the use of polymeric material as the cathode offers certain advantages, such as increasing the capacitance, reducing the equivalent series resistance (ESR), improving ripple current performance, and increasing temperature range. The operation of this type of capacitor works with the principles of charged particles, with the deposited oxide acting as a dielectric and the polymeric material as the charge carrier.

When an electrical field is applied to the anode and cathode, electrons are drawn from the anode into the oxide. This process creates a negative space charge in the oxide and a space charge with opposite sign near the cathode due to the electrons released by the polymeric material. The two space charges create a continuous electric field, resulting in a fluctuating electrical current between the two surfaces and a buildup of charge. Over time the charge will reach a maximum capacity and the capacitor will reach its rated capacitance.

Environmental Performance

Since T520V477M2R5ASE009 capacitors consist of a polymeric material, they have better environmental performance than traditional tantalum capacitors. This is because they are less sensitive to humidity and other contaminants, as well as having higher temperature performance. They also emit fewer electro-magnetic fields than other types of capacitors, making them an ideal choice for applications where EMI is a concern.

Conclusion

T520V477M2R5ASE009 capacitors are useful for a wide range of electronic applications. Their advantages over traditional tantalum capacitors include higher capacitance values, better environmental performance, and higher temperature rating. They are also less susceptible to electro-magnetic interference, making them a good choice for applications with high EMI requirements. Overall, T520V477M2R5ASE009 capacitors offer a great solution for many applications.

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