ECQ-B1223JF

Film Capacitors

Film capacitors, also known as plastic film capacitors, are constructed with plastic films as dielectric and metalized films as electrodes. They consist of flexible plastic films, such as polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polystyrol-terephthalate (PEN) or polycarbonate (PC). The electric charge on the two electrodes of the film capacitor is stored on the two thin films deposited on the flexible plastic film. These electrodes that can be made from either aluminum or zinc-doped polyethylene terephthalate (PET) are ultrasonically welded to a metal conductive strip or lead wire.

ECQ-B1223JF Application Field and Working Principle

ECQ-B1223JF film capacitors are specifically designed for AC applications. They are suitable for a wide range of applications, such as electronic ballasts, power supplies, defrost timers, and industrial motor control systems. The capacitor features a cylindrical case, while its aluminum terminals are pressed into the plastic case providing stability and robustness. It also includes polyester film as its electrolyte, offering superior performance in less space.

The working principle behind ECQ-B1223JF film capacitors is relatively simple. The capacitor consists of two metalized electrodes in the form of thin aluminium strips that are separated by an insulating dielectric material. The film capacitor stores energy in the electrostatic field of the charges induced on the two flat metal strips. When a voltage is applied across the electrodes, the charges distribute themselves over the front and back surfaces of the metalized films according to the magnitude of the applied voltage.

During the operation of the film capacitor, the electric field between the two metalized strips of the capacitor attracts free electrons. This creates a charge accumulation between the electrodes, producing an electric field that opposes the applied voltage. The accumulated electric charge, or leakage current, is affected by the thickness of the insulating layer between the two plates, the capacitance of the capacitor, and the frequency of the applied voltage.

The ECQ-B1223JF film capacitor is ideal for a variety of applications due to its robust design, high capacitance, and low ESR (Equivalent Series Resistance). Its reliable performance ensures low energy losses, making it one of the most suitable components for power electronics systems.