947D511K102BGMSN

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Film Capacitors

Film capacitors are electrical components with two or more electrodes between which a dielectric material is present. They are also known as film dielectric capacitors or film capacitors. Film capacitors are mainly used for low-frequency AC circuits, where the capacitor’s impedance is determined by its capacitance and its reduction of current by its resistance. This type of film capacitor is denoted 947D511K102BGMSN.

Application Field

Film capacitors are normally used for low-frequency AC applications, as they provide better stability than electrolytic and ceramic capacitors in low-noise power supplies, coupling, and snubbing circuits. They are therefore frequently used in DC-DC converters, power amplifiers, loudspeakers, low-noise power supplies, SMPS, EMI/RFI filters, shunt filters, inrush current limiters, and more. In addition to this, they are suitable for EMC applications, such as safety protection and switching power sources.

Working Principle

A film capacitor works by using two or more electrodes, such as metal foil and film, which produce an electric field between them. The dielectric material which is sandwiched between the electrodes, provides a barrier and acts as an insulator. This results in an electric field where the strength of the electric field forces the capacitance change in the dielectric. By adjusting the dielectric constant of the material, the capacitance can be changed. The frequency response of the capacitor is mainly determined by the dielectric material and its thickness.

The main advantages of the film capacitor is that it offers an excellent frequency-response and a low ESR (equivalent series resistance). It is also used in high-voltage and large current applications for a wide range of AC and DC applications. Moreover, film capacitors also have a good temperature stability, excellent reliability, and low parasitic losses.

In conclusion, the 947D511K102BGMSN application field and working principle is one of the many film capacitors available in the market. It provides excellent stability, frequency response, and low ESR in various low-frequency AC applications. It also has an excellent temperature stability, reliability, and low parasitic losses.

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