T540D687M2R5CH86057280

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Tantalum capacitors are a type of electrolytic capacitors with a solid electrolyte consisting of a polymeric matrix with dissolved forms of electrolytes. They are typically made from tantalum pentoxide (Ta₂O₅), a crystalline oxide of tantalum. This allows for the highest volumetric capacitance density, however, due to the hardness and brittleness of the oxide, the capacitors are usually limited to low voltage applications.

The T540D687M2R5CH86057280 is a high-temperature, low-impedance, miniature polymer electrolytic capacitor. It is a self-healing, non-solid electrolyte capacitor with a solid tantalum pentoxide (Ta₂O₅) shell, a dielectric material, and a conductive polymer, typically polypyrrole (PPy). It has a capacitance of 687 μF, an ESR of 900 mΩ, and can operate at a temperature range of -55°C to +125°C.

The T540D687M2R5CH86057280 is designed for use in high-temperature power supply applications such as aerospace and medical implants due to its high-temperature range, high capacitance density, low ESR, and long life expectancy. It is also used in automotive and industrial applications, due to its low inductance, wide temperature range, and high current flow.

The working principle of the T540D687M2R5CH86057280 is based on the dielectric charging and hopping conduction properties of tantalum pentoxide in combination with the conductive properties of the polymer. When an electric current is applied, the Ta₂O₅ layers become charged and form an electric double layer between the two electrodes. The dielectric material, which is in the form of a thin-film polymer, then acts as a dielectric barrier, allowing a very high capacitance to be achieved.

The polymer layer also plays an important role in terms of reducing the ESR and increasing the stability of the capacitor. By altering the thickness of the polymer layer, the capacitor can be tuned to achieve the desired ESR and frequency response. The polymer layer also helps to reduce the leakage current of the capacitor by insulating the charge carriers.

In conclusion, the T540D687M2R5CH86057280 is a low-impedance, miniature polymer electrolytic capacitor that is ideal for high-temperature power supply applications such as aerospace and medical implants. It is highly stable and can be tuned to achieve the desired ESR and frequency response. The unique combination of tantalum pentoxide and polymer materials makes it an excellent choice for a variety of applications.

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