BFC2370EF154

Film Capacitors

Film capacitors, sometimes also called plastic film capacitors, are polarized electrochemical capacitors with metal film dielectric. Developed in the 50s, they are now widely employed in areas requiring high-performance capacitors such as AC rectification, high-frequency switching and DC blocking in regulated power supplies. One of the most popular and versatile types of film capacitors is the BFC2370EF154.

Application Field of BFC2370EF154

The BFC2370EF154 film capacitor is used as an input capacitor for DC voltage regulator circuits, typically across the supply line. Due to its reliability and high temperature resistance, it is suitable for applications in industrial automation, portables, medical, oil and gas, and other extreme environments. It is also suitable for household appliances such as washing machines, dishwashers, dryers, and more.

Working Principle of BFC2370EF154

The BFC2370EF154 film capacitor features a non-polarized cylindrical metalized polypropylene (PP) film, high temperature polypropylene dielectric, and an epoxy resin end termination. The PP film is very thin and offers a very low capacitance so that it can directly represent the difference between current and voltage. The other important components of the film capacitor are the anode, cathode, and dielectric. The anode is a metal lead that is inserted into the center of the PP film, while the cathode is an outer metal layer that surrounds the anode. The dielectric is the reaction point between the two metal layers, allowing the passage of current flow.

When a voltage is applied across the terminals of the film capacitor, a current is established that is proportional to the applied voltage and the capacitance of the device. This current is then blocked when the applied voltage exceeds the capacitance of the dielectric, resulting in a constant voltage across the terminals. This allows the BFC2370EF154 film capacitor to store and release current as required in order to maintain a constant voltage during operation.