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Film Capacitors

Film capacitors, also known as polyester capacitors or Mylar capacitors, are manufactured using multiple layers of plastic films and layers of metal electrodes. The most commonly used films are polyethylene naphthalate (PEN), polypropylene, and Mylar. They are widely used in consumer electronics, power electronics and communications.

BFC237590362 Application Field and Working Principle

The BFC237590362 film capacitor is a Class-X2 capacitor with a maximum voltage rating of 270VAC and a capacitance range of 1.0µF to 2.2µF. It is designed for use in AC applications, such as motor start capacitors, power factor correction, lighting and electromechanical actuators and other industrial applications.

The BFC237590362 is composed of an anode metallic layer, a dielectric film and a cathode metallic layer. The anode and cathode layers are separated by a dielectric film, which is usually a four-layer film composed of a modified polyester film, an oxide layer, an aluminum layer and a second modified polyester film. The construction of the dielectric film, combined with the materials used in the cathode and anode layers, provides superior performance in terms of temperature resistance, humidity resistance, and dielectric properties.

When an AC voltage is applied across the terminals of the BFC237590362 film capacitor, charge is stored in the dielectric field between the plates and the capacitor acts like an open circuit. When the voltage polarity reverses, the capacitor rapidly discharges the stored charge, and the capacitor acts like a closed circuit. This process is repeated rapidly, creating a capacitive reactance, which allows the current to pass through the capacitor, hence providing a capacitive impedance.

The working frequency of the BFC237590362 film capacitor is between 10kHz and 250kHz, which makes it highly suitable for AC applications. The low ESR (equivalent series resistance) of this capacitor gives it a very high ripple current capability. Additionally, it exhibits excellent dielectric properties, even at high temperatures. The BFC237590362 provides excellent noise suppression and temperature stability, making it ideal for many applications.

Conclusion

In conclusion, the BFC237590362 film capacitor is an excellent choice for AC applications such as motor start capacitors, power factor correction, lighting and electromechanical actuators and other industrial applications. It has a maximum voltage rating of 270VAC, low ESR and high ripple current capability. It also provides excellent dielectric properties, noise suppression, and temperature stability.

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