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Film Capacitors: BFC237324684 Application Field and Working Principle

Film capacitors, or film dielectric capacitors, are made up of thin sheets of electrically conductive, dielectric film. The materials used for the dielectric film include polyethylene terephthalate (PET), polystyrene, and polypropylene. The metalized electrodes are formed by maintaining a constant distance between two sets of layers. The main types of film capacitors are plastic film capacitors, metallized plastic film capacitors, paper film capacitors and metal foil film capacitors.BFC237324684 is a plastic film capacitor. It is formed by winding two thin plastic films around a bobbin-shaped core. Plastic film capacitors are compact and lightweight yet offer excellent electrical insulation and stability. They are extremely reliable and feature high capacitance values and low ESR (Equivalent Series Resistance) ratings. This makes them an ideal choice for applications such as power supplies, stabilization, radio frequency (RF) systems, power factor correction (PFC) systems, and audio devices.

Application Field

BFC237324684 is widely used in various applications as the latter offers high capacitance values and low ESR ratings. Its primary application areas are:

• Power supplies, including DC/DC Converters, invertors, rectifiers and power filters.
• Stabilization and filtering in high frequency circuits.
• RF Systems, like radio and TV, satellite systems, radar systems and transmitters.
• Power Factor Correction (PFC) systems.
• Audio devices, like pre-amplifiers, audio amplifiers, sound equalizers, recording heads and headphones.

Working Principle

Film capacitors operate based on a simple principle. When two conducting plates or layers are placed parallel to each other at a certain distance and a dielectric is placed between them, an electric field is created. The dielectric material (plastic films in this case) accumulates the charges when a voltage is applied to the plates. This mechanism of accumulating charge on the plastic film is the fundamental principle on which film capacitors operate.

When the capacitor is charged, the insulation resistance between the electrodes increases, thus capable of providing a high dielectric strength. This makes them suitable for use in high voltage applications. Additionally, film capacitors exhibit a low ESR, which ensures a low temperature rise and high power densities.

Plastic film capacitors are generally used for low to medium voltage applications up to about hundreds of volts, while Metallized film capacitors are used for higher voltage applications. The temperature range of plastic film capacitors is narrow, generally not exceeding about +85℃ and Metallized film capacitors, being made of aluminum oxide, can work in temperatures way higher than that.

Conclusion

Plastic film capacitors are highly reliable in applications where voltage ratings are low to medium. They are available in different packages and are often the best choice for compact designs. In addition, they are highly stable and exhibit excellent insulation values. BFC237324684 is one the plastic film capacitors with a wide application field. It offers high capacitance values and low ESR, making it an ideal choice for various applications.

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