T551B686K030AH4251

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Tantalum - Polymer capacitors are devices that exhibit the highest volumetric energy density and charge/discharge efficiency when compared to other types of high-powered capacitors. T551B686K030AH4251 is among one of the types of tantalum - polymer capacitors widely used in consumer and industrial applications. This article aims to explain the application field of this capacitor and its working principle.

The T551B686K030AH4251 capacitor is also known as a 7R1H series MLCC capacitor. This type of capacitor is based on a high-performance dielectric material made up of an anionic polymer coating and tantalum dielectric particles. It offers a mix of high capacitance, low ESR and excellent high-temperature stability. It is suitable for applications such as pre-filtering, high-frequency rectification, RF decoupling, bootstrapping, and buck/boost conduction.

T551B686K030AH4251 capacitors are particularly suitable for high-reliability and high-temperature applications. Their anionic polymer coating offers increased volumetric efficiencies, making them highly capable for larger voltages and higher frequencies. Due to its low-loss dielectric material, these capacitors are relatively resistant to environmental stresses such as moisture, temperature and shock. Moreover, these capacitors have exceptionally low ESR which makes them suitable for a variety of high-temperature applications such as power converters, energy storage systems and frequency synthesizers.

The working principle of T551B686K030AH4251 is based on a type of polarizable dielectric material which consists of two different layers. The first layer is the tantalum oxide layer which consists of a mix of tantalum oxide micro particles with a dielectric constant of up to 6. The second layer is a soft dielectric polymer layer that provides additional dielectric strength which is responsible for preventing electrical leakage. The two layers are formed together by using a special process called anion doping.

When an electric field is applied to an anion-doped capacitor, electrical charges are attracted to the dielectric material which induces a potential to form close to the edges of the two layers. This potential then accumulates on the metal electrodes of the capacitor to form the capacitance value.

Traditional tantalum capacitors are typically limited in the amount of capacitance they can handle due to their relatively low dielectric strength. However, due to its anionic polymer layer, the T551B686K030AH4251 capacitor offers a much higher capacitance value compared to traditional Tantalum capacitors. These capacitors can also be used in applications which require extremely low ESR values, such as unregulated power supplies and switching power supplies.

In conclusion, T551B686K030AH4251 is a type of high-performance anionic polymer tantalum capacitor. It offers a mix of higher capacitance and increased dielectric strength, making it suitable for applications such as pre-filtering, high-frequency rectification, RF decoupling, bootstrapping and buck/boost conduction. This capacitor also offers exceptionally low ESR values which make it suitable for applications such as unregulated power supplies and switching power supplies.

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