ECQ-E4474KF3

Film Capacitors

Film capacitors are electrical components which are made from a flexible film, such as polymer, mylar, or polyester. These capacitors have many advantages including: low cost, low noise, small size, good temperature stability and long life. The ECQ-E4474KF3 film capacitor is a medium size, high voltage capacitor with a capacitor voltage rating of 250Vdc and a rated capacitance tolerance of ±20%.

Application Field

ECQ-E4474KF3 is mainly used in dc circuits, such as power supplies, alarms, and combiners. They are also used in audio systems, and in high speed and high frequency circuits. In addition, these capacitors are often used in high voltage pulse and commutation devices, as well as in other ac/dc circuits with high frequency and high voltage.

Working Principle

Film capacitors are similar to electrolytic capacitors in that they work based on the accumulation of electrical charge in a dielectric material. The dielectric material is the component of the capacitor that allows electrical charge to accumulate on the capacitor plates and thus create a dielectric field. In ECQ-E4474KF3, the dielectric material is a polypropylene film. This film is etched in a spiral pattern with internal electrodes that provide electrical connections within the core. This spiral pattern and the internal electrodes provide a higher capacitance when compared to typical film capacitors.

When a voltage is applied to a film capacitor, the electric field across the dielectric material causes the accumulation of electrical charge on the capacitor plates. As this charge accumulates, the capacitor stores energy which can be released when the voltage is removed. By alternating the application and removal of voltage, the capacitor can store and release quick electrical pulses which can be used in devices such as pulse power supplies and auto-tune devices.

Film capacitors such as the ECQ-E4474KF3 are also known as non-polarized capacitors because the capacitor does not have a “positive” side that requires a special orientation when connecting the capacitor in a circuit. This allows the use of the capacitor in a circuit without having to worry about the correct orientation of the capacitor.

In conclusion, the ECQ-E4474KF3 is a medium size, high voltage film capacitor, used mainly in dc circuits. The capacitor contains a polypropylene film which is etched with a spiral pattern and internal electrodes, allowing the capacitor to achieve a higher capacitance. The capacitor is also notable for being non-polarized which allows for use in a circuit without specifying any orientation.