BFC238350163

Film capacitors, also known as plastic film capacitors, polyester film capacitors, and metallized film capacitors, are a type of capacitor that is widely used in many electronic devices due to their superior stability in high-frequency applications. The type of film capacitors referenced in this article, BFC238350163, is a metallized polyester film capacitor that is used most often in high voltage d.c. and audio-frequency (A.F.) applications. The following discussion will cover the application field and working principle of BFC238350163 capacitors.

Application Field

BFC238350163 capacitors are most often used in high voltage d.c. applications, such as motor-start circuits, and in audio-frequency (A.F.) circuits. They are preferred to ceramic-based capacitors, as their superior stability in high-frequency environments makes them better suited to these applications. These capacitors have a wide range of capacitance values, they have a maximum voltage rating of 250 volts (V) at a temperature of 85° Celsius (C), and are able to operate in an environmental temperature range of -40°C to +85°C. This type of capacitor is also very robust and reliable, and can generally survive in harsh and electrically active environments.

Working Principle

A metallized capacitor is typically constructed by winding a sheet of polyester film in an oval shape and then coating it in a layer of metal, usually aluminium. This metal coating is what gives the capacitor its metallic appearance. To produce a variable value capacitor, one end of the polyester film is coated in a dielectric material such as aluminium oxide, while the other end is coated in a conductive material such as tin. The electrical and storage properties of the capacitor are determined by the thickness of the dielectric layer and the amount of insulation between the two coiled layers of film. These capacitors operate by storing electrical charge between two conductive plates that are separated by an insulating material. When a voltage is applied to the plates, the plates become charged with equal but opposite electrical charges. This creates an electric field across the capacitor\'s plates, which stores energy. When the voltage is removed, the stored charge is slowly released, but the capacitor\'s plates remain charged until the charge has dissipated completely.

In conclusion, the BFC238350163 capacitor is a type of metallized polyester film capacitor that is widely used in high voltage d.c. and A.F. applications. The capacitor has a wide range of capacitance values, a maximum voltage rating of 250 V, and is able to operate in a wide environmental temperature range. Its working principle involves the storage of electrical charge between two conductive plates that are separated by an insulating material. The electrical and storage properties of the capacitor are determined by the thickness of the dielectric layer and the amount of insulation between the two coiled layers of film.