Film Capacitors

Film capacitors refer to capacitors with thin top and bottom electrodes, usually PEN (PolyEthylene Naphthalate), PET (PolyEthylene Terephthalate), FEP (Fluorinated Ethylene-Propylene) and so on. A thin dielectric film is relatively robust and can be stored for a long time. It is also suitable for high frequency applications. Meanwhile, film capacitor provides excellent performance in high pulse current handling and voltage proof.

ECQ-E6153JFB Application Field and Working Principle

ECQ-E6153JFB is a radial lead film capacitor, applied in telecommunication and industrial control industries. It is provided by Panasonic Electronic Components, having a voltage of 250 VAC and a capacitance range of 1.0 µF to 6.8 µF. Usually, the capacitor contains multiple layers, such as a dielectric, electrodes, and an insulation coating. The design of the capacitor is simple, but it works in a very effective way.

When the capacitor is connected in series with a circuit, an electric field is created between its terminals due to the voltage applied. The electric field is responsible for dielectric polarization on either side of the capacitor, thus generating electrical charge on both its plates. This processes results in the formation of an electric field within the metallic plates, producing a second and opposite electric field in the opposite direction, counteracting the existing field.

This created electric field is equal to the applied voltage but directed in the opposite direction, and the total voltage between both terminals is equal to the applied voltage plus the capacitance voltage. As more and more electrons flow to the capacitor with rising applied voltage, a dielectric strength stress is creating on its insulation layer, which increases the capacitance voltage of the capacitor. Therefore, the capacitance voltage and current flows in the capacitor in opposite directions to that of the applied voltage.

Due to the aforementioned working method, the total voltage on the capacitor\'s terminals never exceeds the specified voltage, ensuring the safety of the component. This feature is critical in mitigating risks from overvoltages in areas including industry control and telecom applications. Thus, the ECQ-E6153JFB is a cost-effective and reliable component for these areas.