BFC246807275

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Film Capacitors

Film capacitors, also known as Film Dielectric Capacitors, are capacitors which use a film as the dielectric material, and metal as the conductive elements. They are commonly used in applications where dielectric, low losses, and high voltage withstand requirements are in place. Compared to other types of capacitors, film capacitors offer excellent frequency and temperature characteristics, voltage stability and low inductance characteristics.

In general, film capacitors are constructed with either solid film or metallic-film construction techniques. The two common types of film capacitors are polyester film, which is also called Mylar or PET film, and polypropylene film. The two main working principles of film capacitors are: DC blocking capacitors; and AC filtering capacitors. Film capacitors are widely used in many applicaitions including power supplies, snubbers, active filters, and for various switching applications.

BFC246807275 Application Field and Working Principle

The BFC246807275 is a polyester (Myler or PET) film capacitor with a voltage rating of 400VDC. This capacitor has an excellent high voltage characteristics and is typically used as AC line filtering, DC blocking, and high-frequency high voltage snubber circuits. It features a very low ESR and a capacitance range of 0.0022-2.2uF.

The working principle of the BFC246807275 is similar to other film capacitors. In this capacitor, two parallel metal electrodes surrounded by a dielectric film are placed between two terminals in a small package. The dielectric film can be made of polyester film or polypropylene film, while the metal electrodes are usually made of aluminum, copper, or tin plated metal. This capacitor can be used for both DC and AC circuits. For DC circuits, the capacitor acts as a DC blocking capacitor, while for AC circuits it acts as an AC filtering capacitor.

In DC blocking applications, the capacitor is placed in series with the DC power supply and provides an AC pathway while blocking DC current which could otherwise damage the circuit. It also serves to reduce high frequency noise components, making it ideal for suppressors, protection circuits, and noise filters. For AC filtering applications, it filters out high frequency noise while allowing low frequency input, making it ideal for low- and high-frequency resonant circuits.

The capacitor also features a temperature range of -40°C to +85°C and is ideal for high-temperature environments. This capacitance also provides excellent tolerance and aging characteristics, making it suitable for high-end applications. In addition, the capacitor offers a long operational life of up to 10,000 hours at a rated temperature of 85°C.

In conclusion, the BFC246807275 is a polyester film capacitor which is widely used in many applications, such as AC line filtering, DC blocking, and high-frequency high voltage snubber circuits. Its excellent temperature range and long lifetime make it suitable for high-temperature applications.

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