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Film Capacitors

Film capacitors are a variation of the standard capacitor, having one or more metallic foil or film electrodes formed around a dielectric material. This type of capacitor can generally offer very good performance over the other types, mainly due to the large surface area of the film electrodes.

The BFC2373FE125MF is a film capacitor with a capacitance of 0.00125 Farads, and a voltage rating of 300 VDC. It has a relatively low ESR (Equivalent Series Resistance) of 0.013 Ohm, and a maximum operating temperature of 85°C. It is available in various case sizes, including an industry-standard TO-220 which will be used for the application and working principle discussed in this article.

BFC2373FE125MF Application Field

The BFC2373FE125MF is an ideal choice for power supply and filter circuits. It is commonly employed in applications such as switching power supplies, DC-DC converters, inverters, and other DC-power applications. It is also used in filter circuits to reduce high-frequency noise, in voltage doubling or rectification circuits, and other high-efficiency applications.

It is also suitable for use in consumer electronics, HVAC equipment, and other applications that require low levels of ESR.

BFC2373FE125MF Working Principle

A Film capacitor functions by storing electrical charge on a pair of conductive films, called electrodes. The electrodes are separated by a dielectric material, which is typically metallic film. When an AC voltage is applied, the current flow to and from the electrodes creates an electric field between the two films, which stores electrical energy. This stored energy is then released when the voltage is removed.

The size of the electric field (and thus, the capacitance) depends on the thickness of the dielectric material, the surface area of the electrodes, and the amount of voltage applied. The capacitance of the BFC2373FE125MF is 0.00125 Farads. It also has a voltage rating of 300 VDC, which means that the capacitance decreases as the voltage rises.

In the TO-220 case, the BFC2373FE125MF is designed to dissipate 1.3 Watts of power, which indicates its ability to store and dissipate large amounts of energy. This makes it an ideal choice for applications requiring high-efficiencies.

Conclusion

The BFC2373FE125MF film capacitor offers excellent performance for various power supply and filter applications. With its low ESR, good capacitance, and high efficiency, it can be a reliable choice for many applications. It is also available in a variety of case sizes, designed to dissipate different amounts of power, making it suitable for a wide range of applications.

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