BFC247956753

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Film Capacitors

Film capacitors, also known as film dielectric capacitors, are constructed with metallized plastic films instead of metal or paper. The metallic layers of the film capacitor are almost always positioned in the middle of the plastic film to form a dielectric layer. This dielectric layer prevents electrical energy from passing through the film capacitor. The metal oxide film used in the construction of film capacitors can used for certain high-end applications because of its high dielectric constant, high breakdown voltage, and low conduction loss.

BFC247956753 Application Field and Working Principle

BFC247956753 Film Capacitors are mainly used in high-frequency circuits, such as television, radio, and other communication equipment output filters, antenna tuners, and sound reinforcement and loudspeaker crossover networks. They are also used to couple amplifiers and other audio equipment. When these capacitors are called upon in such applications, the capacitances usually range between 0.05 and 47 nF, and capacitance tolerances may rise to +/- 10 %.

The working principle behind this type of film capacitor is fairly simple. When a voltage is supplied to the capacitor, an electric field as well as an electric current pass through two metal layers, creating a charge on the capacitor. This in turn causes the electric current to flow through the capacitors’ dielectric layer. As the current increases, the electrons within the dielectric layer begin to move to balance the current. This results in an increased resistance which reduces the electric current, thereby forming the capacitor’s capacitance. In other words, this type of film capacitor stores and releases electrical energy.

BFC247956753 Film Capacitors offer the benefits of high-reliability, wide range of applications and capability for producing and testing to meet various system requirements all within a small size. These features make them suitable for a broad range of uses in numerous industries.

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