BFC233663222

Film Capacitors

Film capacitors are an interesting form of capacitor in which a very thin and highly polished film is used as a dielectric. They are typically made of polypropylene or polystyrene. Film capacitors are available in both non-polarized and polarized varieties. Generally, if the capacitance of the capacitor is greater than 0.2µF then it is usually polarized.

BFC233663222 Application Field and Working Principle

Film capacitors, such as the BFC233663222, are widely used in a large number of applications due to their relatively low cost and good performance. They are commonly used in the electronic circuit as a signal coupling, decoupling and timing element.

The BFC233663222 film capacitor is an electrolytic capacitor. Electrolytic capacitors use a chemical dielectric in order to achieve a high capacitance. Due to the chemical nature of the dielectric, the capacitance decreases with increasing temperature. This capacitor typically has an operating temperature range of -55°C to +105°C. The electrical capacitance of the BFC233663222 is also relatively stable over its operating temperature range.

The working principle for this capacitor is simple, though it is generally obtained by utilizing a combination of two principles. First, electrostatic principle is used. An electrical field is created between two conductors, the electrodes, spaced apart in an insulating material of dielectric. The electric field stores electrical energy as the permanently fixed charges on the two electrodes repel each other. As a result, the voltage drop across the terminals of the capacitor determines the amount of electric energy stored by the device.

The second principle involved here is the capacitance. This principle states that when two conducting plates of area A separated by a dielectric of thickness d, the charge separation caused by an electric field causes an equal but opposite charge to form on the other plate. This results in capacitance C of the system being equal to: C = εA/dwhere ε is the permittivity of the dielectric.

Therefore, by understanding these two principles, we can understand how the BFC233663222 film capacitor works: An electric field exists between two electrodes in a polypropylene or polystyrene film. The electric field creates an opposite but equal charge on both plates, allowing the capacitor to store energy on a repeated basis at low voltage. This process is repeated as long as the voltage across the capacitors is within its operating range.