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Film Capacitors

Film capacitors, also known as plastic film capacitors, are capacitors that use a thin plastic film as the dielectric. They are constructed with two or more metallic electrodes separated by the dielectric film. The film is mostly polyester, polypropylene, polycarbonate, polystyrene or even polysulfone, depending on the desired characteristics.

BFC230344474 application field and working principle

The BFC230344474 is an electro-film capacitor which contains two or more metallic electrode layers separated by a dielectric film. Its capacitance value varies with temperature changes and is widely used in applications such as power, resonance, and filter circuits. It is typically available in voltage ratings between 16 VDC and 250 VDC.

The working principle of a film capacitor is based on the direct electric displacement effect, meaning that when a voltage is applied across two opposite electrodes separated by a thin dielectric layer, a small electric field will stabilize or attracted electrons that break their chemical bonds and move along the electrode wall. As a result, the neutral particles are attracted to the electrodes, forming electrostatic layers and consequently creating an electrostatic capacitance.

Due to the high-dielectric materials used as the electric layer such as polyester, polycarbonate, and polypropylene, such capacitors are known for their excellent temperature stability across wide temperature range and long service life. The resulting capacitance is very stable, so no series or parallel connections are needed.

The BFC230344474 is a highly reliable device with a voltage rating of 16V to 250V. It is particularly suitable for use in power supply networks, filters, RF applications, overvoltage protection and high and low-temperature ambient operations. The ripple current rating of the BFC230344474 provides an excellent power broadening effect, making it an extremely efficient capacitor. Withstanding voltage of up to 8.5 KV; they are highly suitable for operating in high-voltage networks.

Due to their excellent temperature stability, high ripple current ratings, and broad operating voltage range, the BFC230344474 capacitors are commonly used in power supply configurations, including DC-DC converters, switched-mode power supplies (SMPS) and motor drives, as well as capacitor banks for applications such as start-up circuits, AC/DC converter circuits, and low- and high-frequency applications. Additionally, due to their load life stability, they are also used for audio/video lines, communications equipment, and RFID tags.

Overall, the BFC230344474 is a versatile and high-performance electro-film capacitor that contains two electrodes separated by a dielectric film to provide excellent temperature stability and ripple current ratings. Its capacitance value also varies with temperature changes, making it applicable to a wide range of applications, such as power supply networks, filters, RF applications, and other circuits.

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