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Film Capacitors

A film capacitor, also called as a plastic film capacitor or more recently as a polypropylene film capacitor, is a capacitor that uses a thin plastic film as the dielectric. This type of capacitor is mostly used for AC applications like blocking, bypassing, decoupling and filtering. Here we discuss in detail about BFC238300474 film capacitors, their application fields, and working principle.

Application Field

The BFC238300474 rectangular film capacitors are the industry standard for general purpose use in AC low voltage application, such as audio equipment, motor run, home appliances, etc. The capacitors offer excellent safety parameters, temperature stability, long life and high AC voltage resistance. The BFC238300474 capacitors are available with capacitance ranging from 0.001uF to 15uf and operating voltage of 250VAC. They are especially suitable for AC applications requiring more stable performance or higher and wider temperature range. The BFC238300474 capacitors are available in radial, perpendicular, DIN rail mounting and terminal style.

Working Principle

The working of BFC238300474 rectangular film capacitors is based on the insulation of plastic film between two metallic conductors and the charging and discharging of electric currents. The metal conductors are usually aluminum or zinc which are separated by a dielectric material, such as dielectric polyester (PET), polyethylene terephthalate (PETP), polyproppylene or paper. The capacitance of the BFC238300474 capacitor is directly proportional to the thickness of the dielectric material and inversely proportional to the distance between the two conductors. When the capacitor is connected to AC voltage source, electric charge is stored in the capacitor which is proportional to the product of the applied voltage and the capacitance. The capacitor will store electric charge until the potential difference between the two conductors is zero. Hence, the capacitor acts as a resistor in the AC circuits and prevents the flow of electric current. The frequency of operation is one of the most important parameters of the BFC238300474 capacitors which determine their performance in the circuit. Generally, the capacitance of these capacitors will increase with the increase in frequency.

Conclusion

BFC238300474 capacitors are widely used in AC low voltage applications and they offer excellent safety parameters, temperature stability, long life, and high AC voltage resistance. The capacitance of the BFC238300474 capacitors is directly proportional to the thickness of the dielectric material and inversely proportional to the distance between the two conductors. The frequency of operation is one of the most important parameters of the BFC238300474 capacitors which determine its performance in the circuit.

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