BFC236722334

Film Capacitors

BFC236722334 is a type of film capacitor. A film capacitor is a type of capacitor made with plastic film as the dielectric. It has the characteristics of high dielectric strength, self-healing property, low temperature coefficient of capacitance, high input impedance, low dissipation factor, excellent insulation and reliable performance over a wide temperature range.

Application Field

Film capacitors have a wide range of applications, such as power electronics, electronic equipment, automotive electronics, communication, audio equipment, electric motors, solar energy and consumer electronics. Film capacitors are mainly used for filtering, coupling, bypass, energy storage, signal control, voltage rectification, waveform division, temperature compensation and other comprehensive circuit applications.

Working Principle

A film capacitor works by using two metal electrodes to sandwich an interlayer dielectric, usually made of mylar or polyester, in between them. When a voltage is applied, an electric field is formed between the two electrodes. This electric field polarizes the molecules of the dielectric, forming an electric dipole. The dipole creates a barrier between the two electrodes, which increases with the voltage, thus forming a capacitor.

The capacitance of a film capacitor is determined by its size. The larger the capacitor, the higher its capacitance. As the voltage across the capacitor increases, the electric field will become stronger and the capacitance will remain unchanged. The amount of charge stored in the capacitor is equal to the product of the capacitance and the voltage applied.