SFC37T45K391B-F

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Film capacitors, also referred to as polyester or plastic film capacitors, are a type of capacitor that is made of a thin plastic film. They are widely used in a variety of electronic circuits for applications such as filtering, signal timing, energy storage, and signal coupling.In recent years, the popularity of film capacitors has grown as their cost has come down and their performance has improved.The SFC37T45K391B-F is a kind of film capacitor and its application field and working principle will be introduced here.

Application

The SFC37T45K391B-F film capacitor is primarily used in audio, telecommunication and medical electronic circuits.It is especially suitable for applications such as high-end audio, high-end modulation, microphone preamplifiers, HF up-converters, and HF down-converters where high stability and low drift are required.In addition, it has been successfully used in DC to DC converters, AC-DC converters, and other switching power supplies.Due to its high temperature stability, it is also ideal for industrial control applications.

Working Principle

Film capacitors work by creating an dielectric layer between two conductive plates.The SFC37T45K391B-F film capacitor uses two thin films of polyester placed between two metal electrodes to create this dielectric layer.One of the electrodes is a thin layer of aluminum deposited on the polyester film, while the other is a thicker layer of nickel-coated aluminum foil.The two metal plates are then connected to the external terminals.When a direct current is applied to the capacitor, the two metal plates establish a Coulomb field and an electrical field is set up in the dielectric layer.The electrical field produces a capacitance, which is determined by the dielectric\'s permittivity and the distance between the metal plates.The capacitance of the SFC37T45K391B-F is stable over a wide range of temperatures and frequencies.

The SFC37T45K391B-F is a high-performance film capacitor that is designed for use in audio, telecommunications, and medical electronic circuits.It can provide stable capacitance over a wide range of temperatures and frequencies, making it an ideal choice for high-end applications demanding high stability and low drift.In addition, its cost and performance make it suitable for a variety of power supplies and industrial control applications.

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