MKP1841347406G

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Film Capacitors

A film capacitor, or FkM capacitor, is a course of electrical component made from two or more metallic foil sheets separated by insulating layers of plastic “film”. This type of design allows a film capacitor to provide very high capacitance values in comparison to their size, but with the downside of having much lower ripple current ratings than their electrolytic counterparts. The MKP1841 series, in particular, are an ideal choice for filter circuits, energy storage, coupling and decoupling in a variety of applications.

MKP1841347406G Application Field and Working Principle

The MKP1841 series is available in a wide variety of shapes, sizes, and capacitance values—ranging from 0.0047μF to 100μF, and featuring voltage ratings from 150VDC to 630VDC. Consequently, these film capacitors can be used in a wide range of high-frequency AC circuits, as well as higher-frequency DC circuits. Some common applications can include CRT TVs, PC power supply, communication devices, switching mode power supply, lighting fixtures, and DC/DC converters.

In terms of the working principles behind these capacitors, film capacitors provide effective capacitance in circuits due to their ability to reduce high-frequency noise and smooth out any spikes in current or voltage. This is achieved by the insulating film between the layers of metal foil acting as a dielectric. When an electric current is passed through the parallel capacitor plates, it forms a magnetic field which then causes the capacitor to accumulate a charge between the plates. When the current is removed from the capacitor, this accumulated charge is stored and can later be used to even out any irregularities in electric current.

The performance of film capacitors, such as the MKP1841 series, can be further enhanced by allowing them to incorporate metalized film and ZnO suppression layers. These features are included to ensure that the capacitors have a low dissipation factor, high insulation resistance, and superior self-healing properties—in other words it can reduce inductance and provide superior electrical insulation.

Conclusion

The MKP1841 series film capacitors provide an affordable yet reliable and efficient solution for a variety of power-electronics applications. It combines the large capacitance values with relatively low impedance and its low-voltage and ripple current specifications make it an attractive and flexible choice for many different uses, ranging from TV and PC power supplies to energy storage and DC/DC converters.

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