947D421K122CGRSN

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Film capacitors are a category of capacitors that use film as the dielectric material. They are one of the most popular capacitor types due to their long life, low cost, and wide range of applications. The 947D421K122CGRSN capacitors belong to the film capacitor family, and are widely used in various applications. This article will discuss the application field and working principle of 947D421K122CGRSN capacitors.

Working Principle

Film capacitors work by storing electrical charge between two conductive plates separated by a dielectric material. The dielectric material used in 947D421K122CGRSN capacitors is a polyethylene film, which is why these capacitors are referred to as film capacitors. When the electrical charge is applied to the plates, an electric field is created within the dielectric material. This electric field then produces an electric field between the two plates, causing charges to accumulate on the plates. The magnitude of the electric field is determined by the type and thickness of the dielectric material used and the distance between the two plates.

When an alternating current is applied, the charges on the plates alternate. This causes a change in the amount of electrical charge stored between the plates, resulting in an alternating current passing through the capacitor. The magnitude of the current passing through the capacitor is dependent on the equivalent series resistance (ESR) of the capacitor. The ESR is determined by the quality of the dielectric material used, the thickness of the film, and the size of the capacitor.

Applications

947D421K122CGRSN capacitors are widely used in various types of electronic circuits and applications. These include everything from computer motherboards to power supplies, audio systems, and video equipment. In addition, film capacitors are also used in automotive applications such as fuel pumps, engine control systems, and anti-lock braking systems.

Due to their low cost, low ESR, and high-temperature tolerance, film capacitors are often used as high-voltage capacitors in power supplies. In this application, the capacitor is used to filter noise induced by the switching of the power supply. In addition, it is also used to reduce the voltage ripple caused by the switching of the power supply. This application helps to ensure that the power supply operates at a stable voltage and current.

Film capacitors are also used in high-frequency or high-power audio applications. In this application, the capacitor is used to filter out any unwanted low-frequency noise from the audio system. This helps to improve the sound quality of audio systems.

Finally, film capacitors are also used in the automotive industry. In this application, the capacitor is used to reduce the voltage ripple in power steering systems and in the anti-lock braking system. This helps to reduce the amount of stress placed on the motor and ensures smoother operation of the system.

Conclusion

947D421K122CGRSN capacitors are a type of film capacitors that are widely used in various applications due to their long life, low cost, and wide range of applications. They work by storing electrical charge between two conductive plates separated by a dielectric material. The capacitor can then be used in various applications, such as power supplies, audio systems, and automobile systems.

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