MKP18453366341R

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Film Capacitors

Film capacitors refer to capacitors with insulation films used as the medium of dielectric layer. Film capacitors can be divided into two categories: polyester film capacitors and polypropylene film capacitors. The MKP18453366341R is a polypropylene film capacitor with its application field and working principle.

Application Field

The MKP18453366341R is a low voltage item developed for filter use in AC/DC circuit and it has an excellent frequency characteristic. It can be used as audio frequency filter networks, automatic gain control amplifiers in broadcasting amplifiers, inrush current control circuits, inrush current limiters in motor and transformer control circuits, line and color suppression circuits in TV sets, encased power supply filters, and noise filters for switching power sources.

Working Principle

A film capacitor, such as the MKP18453366341R, is constructed using a metalized polypropylene film as the dielectric and a coating of tin-alloy on both sides of the dielectric film. This configuration forms two layers of electrode and dielectric between them forming a capacitor element. When an alternating electric field is applied across this capacitor, the electrostatic field of the dielectric prevents a direct current from flowing, thereby creating and storing electric energy.

When an AC voltage is applied to the capacitor, current will start to flow in order to create a varying electrostatic field in the dielectric. This varying electrostatic field causes the capacitor to store and release energy in a cyclical manner. As the alternating voltage on the capacitor increases, so does the current, which leads to more energy being stored and released in each cycle. This relationship is reflected in the curve pattern of the capacitance.

Conclusion

The MKP18453366341R is a polypropylene film capacitor ideal for low voltage applications. Its wide range of applications include audio frequency filter networks, automatic gain control amplifiers, inrush current control circuits, encased power supply filters, and noise filters for switching power sources. The working principle of a film capacitor is to create and store electric energy through the generation of an electrostatic field between two electrodes, and the alternating voltage on the capacitor determines the amount of current flowing and the amount of energy stored and released.

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