947D681K801BFJSN

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Film capacitors, also known as film dielectric capacitors, are one of the types of capacitors used in electronic circuitry. The name is derived from the fact that the dielectric material used in the construction of the capacitor is a thin film of polyester, polypropylene, or other polymeric material. The 947D681K801BFJSN application field and working principle of film capacitors are as follows:

Application field

Film capacitors are used in a variety of applications ranging from power electronics to digital circuitry. They are used in the electronic control systems of automobiles, the electronic circuits of audio and communication equipment, and the high-voltage circuits that are found in power supply and inverters. Additionally, film capacitors are used in motor-run applications, UPS systems, and general industrial equipment.

Film capacitors are also utilized as decoupling capacitors in power supplies and audio circuitry. Decoupling capacitors help to reduce the amount of electromagnetic interference and also lower the amount of noise that is induced into the circuit from outside sources.

Film capacitors are also used in array-amplifiers, filters, and voltage regulation circuits, providing circuit designers with a cost-effective solution to their design requirements.

Working Principle

A film capacitor works according to the principle of electrostatic capacitance. This type of capacitor is formed by two conducting plates separated by a thin dielectric material, usually a thin film of polyester or other polymeric material. When an electric voltage is applied between the two plates, a charge is stored in the dielectric material, creating a field of electrostatic force. This electrostatic field is capable of storing significant amounts of energy for brief periods of time, allowing the capacitor to act as a power source or energy storage device.

The performance of film capacitors is determined by the dielectric material used, its thickness, and the permittivity of the material. Generally, thicker dielectric materials have higher permittivity values, which allows them to store more energy. Additionally, the size of the plates and their spacing also affect the capacitance value.

Film capacitors also exhibit advantages over other capacitors, such as electrolytic capacitors. These advantages include their stability over wide temperature ranges, their low dissipation factor, and their high insulation resistance. Film capacitors are also more reliable, making them well-suited for applications where reliability is critical.

In conclusion, film capacitors are widely used in a variety of applications due to their performance and reliability. Their working principle is based on the principles of electrostatic capacitance, and their performance is determined by the dielectric material used and the size of the plates. Film capacitors exhibit significant advantages over other capacitor types due to their stability, low dissipation factor, and high insulation resistance.

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