ECQ-E6823KF

Film Capacitors

The ECQ-E6823KF is a series of film capacitors which are primarily used for filtering applications. The capacitor is formed by winding two layers of dielectric laminated film, known as Class F insulation, with a metal foil in between, then encasing the whole assembly in plastic and metal cans. This type of film capacitors offers a high capacitance in a very small form factor, making them ideal for high-density, high performance designs. They are also designed to have excellent stability and have a much longer lifetime than other types of capacitors.

Application Field

Film capacitors have a wide range of applications, but the ECQ-E6823KF series is specifically used for high-frequency applications. Due to their small size and high capacitance, they are ideal for designs needing high-frequency filtering work on signals from 2 MHz to over 2 GHz. They are also commonly used as high-density storage capacitors for battery back-up applications, and in multi-phase buck or boost converters.

Working Principle

The ECQ-E6823KF works on the principle of electrostatic capacitance, where capacitance is the ability of a material to store electric charge. This can be visualized as two metal plates isolated from each other, but kept close enough to be affected by electric fields. When a voltage is applied to the plates, electrons begin to move and accumulate on one of the plates, while the other plate accumulates holes. This results in a negative charge on one plate and a positive charge on the other. This creates what is known as an electric dipole and the amount of capacitance is proportional to the dipole strength. In the ECQ-E6823KF, the plates are replaced by the two layers of Dielectric laminate film, with the metal foil in between. As a result, the capacitance of the capacitor is determined by the area of the film, the thickness of the dielectric layer and the dielectric constant of the material.

Conclusion

The ECQ-E6823KF series of film capacitors is an ideal choice for high performance, high-density designs, specially designed for high-frequency applications such as signal filtering, power supply, and battery back-up applications. It offers a high capacitance in a very small form factor, and its design ensures excellent stability and a much longer lifetime than other types of capacitors.