BFC237590505

Film Capacitors

A film capacitor or film dielectric capacitor is a type of capacitor with a thin non-metallic dielectric, typically plastic film, which is equipped with electrodes on both sides. Connected to a power source, electrons flow across the material creating an electric field that has the capacity to store energy temporarily.

The BFC237590505 is an axial-lead film capacitor designed for A.C. and pulse operation. The capacitance of the BFC237590505 ranges from 0.47μF to 4.7μF, with a specific value of 68μF. The working temperature range for this type of capacitor is from -40°C to +85°C, and its rated voltage ranges from 400V to 2000V AC. It is a double-layer metalized PET capacitor, also called metallized polyester capacitor, which utilizes plastic film as the dielectric.

Application Field

The BFC237590505 has multiple applications in electronic circuits, such as pre-charging, noise reduction, filtering, motor start, strobe memory, low frequency oscillating, energy storage, and DC coupling in audio applications. It is a versatile capacitor that is widely used in power supplies, inverter circuits, domestic appliances, air-conditioners, TV sets, washing machines, speakers, chargers, and related fields.

Working Principle

The BFC237590505 is composed of two metallic electrodes in contact with a dielectric material. When a voltage is applied to the terminals, a current flows across the dielectric in a manner that varies according to the applied voltage’s frequency. As the frequency increases, the current experiences an increase in inductive reactance, allowing the capacitor to become more resistive to its own current. The current gradually starts to decrease until it is nearly completely inhibited. This is the resonant frequency, where the capacitive and inductive reactance are equal, and the current is almost zero.

The capacitor works under the principles of electrostatic action. It stores energy in the electric field created when electrons accumulate on the electrodes or move away from them. The dielectric material’s permittivity, or dielectric constant, is an important factor influencing the capacitor’s capacitance. A larger dielectric constant would result in a larger capacitance. The ability of the capacitor to store energy depends on the size of the dielectric, which acts as a buffer between the electrodes. The larger the area between the electrodes, the more energy the capacitor can store. When the capacitor is discharged, the stored energy is released and the electrons move away from the electrodes. This is when the capacitor’s energy storage capability disappears.

The construction of the BFC237590505 allows for relatively easy mounting and adjustment. Its compact structure makes it a good fit for applications that require low space consumption. This relatively complex capacitor is available in two versions: the axial-lead constructions, and the surface mount design.

Conclusion

In conclusion, the BFC237590505 is a high-performance film capacitor with a wide range of applications. It features a relatively high capacitance and impressive temperature stability. Additionally, it has a low impedance profile that makes it suitable for pulse, A.C. and D.C. operations. As a major benefit, it can be either axial-lead or surface mount, making it suitable for a variety of circuit designs.