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Film Capacitors

Film capacitors are a type of capacitor which use a thin plastic film as the dielectric. They are widely used due to their superior temperature and frequency characteristics, low dielectric loss, long service life, and good ripple current performance. The SFT37T80-10K391E-F film capacitor is an example of a film capacitor that is widely used in various electronic applications.

Application Field

The SFT37T80-10K391E-F is an axial aluminum electrochemical capacitors featuring an excellent combination of features, such as low ESR, low impedance, high ripple current, high temperature resistance and long service life. It is used in various consumer electronics, industrial electronics, and communication equipment for filtering, filtering, buffering, smoothing and decoupling.

In consumer electronics, the SFT37T80-10K391E-F is used in power supplies, automotive systems, TV receivers, VCD players, digital cameras, portable audio and television sets, and other electronic equipment. Additionally, in industrial electronics, the film capacitor can be used for frequency converters, UPS systems, lighting, welding machines, and inverters.

The capacitor is also used in communications equipment, including computers, base station transmitters, amplifiers, wireless antennas, and satellite communication systems.

Working Principle

The SFT37T80-10K391E-F film capacitor functions as an energy storage device, utilizing an electrochemical reaction between two electrodes. This reaction creates an electrochemical field that holds electrical charge against the plastic film, or dielectric, with a metal foil structure. This process allows for highly stable electrical currents.

The film capacitors come with two leads, a positive and a negative lead, and the distance between them determines the capacitance value. When a voltage source is connected across the leads, the positive lead attracts electrons, while the negative lead repels the electrons. This creates an electric field that is stored as potential energy within the dielectric. When a current flows through the capacitor, this energy is discharged.

The SFT37T80-10K391E-F film capacitor has a capacitance range of 2.2-10µF, an operating temperature range of -40°C to +85°C, and an insulation resistance of 100M. It is RoHS compliant and has a long service life of at least 5000 hours, with a voltage range of 10V to 800V.

In summary, the SFT37T80-10K391E-F film capacitors are used in a wide range of applications, including consumer electronics, industrial electronics, and communication equipment. It is renowned for its low ESR, low impedance, high ripple current, and high temperature resistance. The working principle of the film capacitor involves the creation of an electrochemical field, which stores energy within the dielectric, to provide highly stable electrical currents.

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