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Film Capacitors

BFC237521303 Application Field and Working Principle

Film capacitors are electronic components used for passing current between two terminals. They are constructed with plastic films that are made of multiple dielectric layers and serve to separate two or more metallic electrodes, making them useful for various AC and DC applications. The particular film capacitor model in question - BFC237521303 - is designed for a variety of uses in medical, power, and high-frequency electronic equipment. This article provides an overview of this product, its technical characteristics, and how it functions.

Technical Specifications

The BFC237521303 is a non-polarized film capacitor designed for use in a variety of applications. It holds a maximum operating voltage of 630 VDC and offers low dissipation factor based on its 0.08 maximum impedance. It operates in a temperature range of -55 to +125 degrees Celsius and has a capacitance range of 0.01 to 0.73 µF. The capacitor is also rated for maximum ripple current, and its long-term reliability is ensured by UL recognized, VDE, and ENEC certification.

Working Principle

BFC237521303 is a film capacitor which operates based on the laws of electrostatics. When an electric charge is applied to its terminals, electric field lines will start to form between it’s two metallic plates that are separated by insulated plastic film layers. The field lines will only form between two oppositely charged surfaces, resulting in an attraction force and the capacitance of the capacitor. As current continues to flow through the capacitor, the charge stored on its plates will increase or decrease, creating a potential difference between the plates. The change in charge will result in a voltage difference between the two sides of the capacitor, which can be utilized for various applications.

The dielectric film layers of the capacitor play a crucial role in its operation. They serve to reduce the electric field intensity and increase the capacitance of the device. Additionally, they allow for the construction of fine electric field lines around the capacitor, which influence the amount of charge stored on each plate. By varying the dielectric material and strength, manufacturers can vary the capacitance and voltage of a film capacitor.

Applications

Film capacitors, like the BFC237521303 model, are equipped with many features making them a great choice for various medical, power, and high-frequency electronic applications. In medical applications, they are used to store energy for medical devices, such as defibrillators. They can also be used on electric vehicles, such as electric bicycles, as well as in power factor correction for regulated power supplies. Another application of film capacitors is in high frequency electronics, where they are used as coupling capacitors to reduce or block voltages from passing through an electrical circuit.

Conclusion

The BFC237521303 film capacitor is an electrical component that can store energy in forms of electric charges and be used in a variety of applications. It has an operating voltage of 630 VDC, an operating temperature range of -55 to +125 degrees Celsius, and a capacitance of 0.01 to 0.73 µF. This capacitor is UL recognized, VDE certified, and ENEC approved, making it highly reliable for use in long-term applications. It is useful for medical, power, and high-frequency electronics applications and follows the principles of electrostatics to function.

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