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Film Capacitors

Film capacitors are a type of capacitor, which works based on the principle of storing separate electric charges on two flat metal plates that are separated by thin layers of film. These layers are usually made of a type of plastic material, and depending on what they are made of, also affect the properties of the capacitor. On the basis of their construction and application, film capacitors can be classified into various types including polyester film capacitors, polypropylene film capacitors, polystyrene film capacitors, nanoceramic film capacitors, Teflon film capacitors, and more. In recent years, researches have also focused on developing enhanced film capacitors to solve the problems of low temperature special performance and frequency transition, reduce the temperature coefficient and achieve smaller voltage coefficients, thus making them suitable across a wide range of high-frequency applications requiring different capacitors.

B32913A5474K000 application field and working principle

The B32913A5474K000 capacitor is a polyester film capacitor with a metallized polyester film dielectric. It exhibits excellent electrical behavior with low dissipation, low inductance, high insulation resistance, and a wide frequency response. This capacitor has a capacitance range from 0.1µF to 4.7µF and voltage ratings up to 250V DC. It has a tight tolerance of 10% and is available in through-hole and surface mount packaging.

B32913A5474K000 capacitor is ideal for a variety of applications, particularly in high-frequency noise suppression circuits, DC-block capacitors, general filtering, and switch-mode power supplies. They are especially suitable for inverter application and AC motor drives due to their self-healing properties, low voltage coefficient and resistance to high frequency interference. These capacitors are also used in capacitive measuring circuits, signal coupling circuits, and in energy-saving transformers.

In terms of its working principle, the B32913A5474K000 capacitor stores and releases energy by accumulating an amount of electric charge on its two metal plates. When a DC voltage is applied across the capacitor, the electric field between these plates increases and the capacitor is charged. When a sufficiently high voltage has been reached, the capacitor is discharged and the stored electric charge is released. This process continues, allowing the capacitor to store and release energy in an alternating fashion.

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