BFC233926474

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Film Capacitors

Film capacitors, also called plastic capacitors, are fixed capacitors whose anode electrode is made of thin metal foil and the cathode electrode is a thin plastic film. The film capacitor is characterized by an extremely thin dielectric layer. Capacitance and voltage rating depend on the thickness and dielectric constant of the plastic film. It is also known as the "thinner the film, higher the insulation resistance". BFC233926474 film capacitors is a kind of film capacitor.

Application Field

BFC233926474 film capacitors are widely used in general-purpose applications such as AC and DC filters, coupling, bypassing, energy storage, etc. In particular, its high frequency performance is excellent, can be used in the electronic ballast of CCFL backlight of LCD TV, the power supply of electronic fluorescent lamps, and in dc-dc converters of TV and personal computers. It is also widely used in industrial and medical equipment, such as TVs, video recorders, VCRs, radio receivers, air conditioning, variable frequency fans, servos, computers, endoscopes, ultrasound and spectroscopy.

Working Principle

The working principle of BFC233926474 film capacitors is relatively simple. The film serves as the dielectric, and one or more thin metal layers are formed on it as the electrodes. When power is applied to the electrodes, charges accumulate on the respective sides of the dielectric layers. The electric field in the dielectric affects the movements of the charges, which can result in a potential difference across the plates. This potential difference is what we call the capacitance of the plate. As the capacitance increases, the amount of electric field and charge stored in the dielectric also increases.

Advantages

• Excellent temperature characteristics;
• Lowleakage current and low dissipation factor;
• Small size, large capacity;
• Stable working performance;
• High breakdown voltage and insulation resistance;
• Low-loss capacitance stability at high-frequency;
• No environmental pollution.

Disadvantages

• High cost;
• Large capacitance values can only be achieved through multiple paralleling;
• Large temperature coefficient;
• Voltage range is limited.

Conclusion

BFC23

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