BFC237390023

Film Capacitors

The BFC237390023 is a type of film capacitor which functions to store energy and reduce electrical noise in an electrical circuit. Film capacitors use a thin film of plastic-like material to separate layers of electrical charges rather than a dielectric material (such as ceramic or paper) as is common with other types of capacitors.

Application Field and Working Principles

Film capacitors are commonly employed in a variety of power supply, audio and video applications. In power supplies, they can function as power line filters, storing and releasing energy to reduce line noise. In digital applications, film capacitors are frequently employed as decoupling capacitors, filtering and bypassing high-frequency signals, suppressing transients, and providing charge storage. In audio applications, film capacitors are commonly employed in speaker crossovers, crossover networks, tweeter protection, and other filtering applications.

The working principle of the BFC237390023, as well as other film capacitors, is based on the space charge effect. When a voltage is applied across thin film electrodes, an electric field is created. This electric field causes the electrons in the energy bands of the electrodes to flow towards the oppositely charged side, forming a space charge. This space charge creates an opposite electric field, which counteracts and reduces the original electric field and charges the opposite side of the electrodes.

The capacitance of the BFC237390023, as with all film capacitors, is determined by the dielectric constant of the dielectric material and the electrode spacing. The capacitance of the BFC237390023 is also influenced by the temperature and the frequency of the applied voltage. At higher frequencies, the capacitance decreases due to the skin effect, which causes electrons to migrate towards the surface of a conductor in an alternating current. The capacitance of the BFC237390023 is also affected by the humidity of the surrounding atmosphere.

The BFC237390023 is a very reliable film capacitor, offering a high insulation resistance of greater than 1000MΩ, a maximum operating voltage of 100VAC, and a very low ESR of 0.004Ω. It is an RoHS compliant device, making it exempt from hazardous substances.