ECQ-E2125KFB

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Film capacitors are fundamental components in electrical engineering, composed of two electrodes separated by an insulating dielectric layer made of polymer film, paper or ceramic material. These devices store energy in an electric field formed by capacitor construction. ECQ-E2125KFB is an example of film capacitor which is suitable for a wide range of applications.

Introduction to ECQ-E2125KFB

The ECQ-E2125KFB is a radial-lead Polyester Film Capacitor manufactured by Panasonic, designed for both high-frequency and low-frequency applications. This device features two rectangular epoxy-coated leads, a 250VAC rating and a tolerance of ±20%. Its operating temperature range is between -40°C and 85°C and it has a rated insulation resistance of 10Gohms at 250VAC.

Application Field of ECQ-E2125KFB

There is a wide range of applications for the ECQ-E2125KFB, making this component a highly versatile device. It is used in many areas of electronics, such as digital, analog, intermediate frequency or radio frequency. Its applications include motor control systems, lighting, power supplies, test circuits, audio power amplifiers, counter-top display cases, exhaust gas systems or switching circuits.

This film capacitor is highly suitable for high-frequency or switch mode power supplies due to its low impedance characteristics and its ability to carry significant surges. The device is also mainly used in timing and wave-shaping circuits in television receivers and it is ideal for various audio circuits, including noise reduction and EMI filtering.

Working Principle of ECQ-E2125KFB

The working principle of this device is based on the fact that a capacitor stores energy in an electric field. When connected to a power source, the terminal plates of the film capacitor will become charged with electric charge. The capacitor then stores electric charge in its dielectric layer and when the current flow stops, the equal amount of charge will remain stored in its dielectric layer.

When an AC voltage is applied to the device, it exhibits capacitive reactance, which opposes the rate of change of voltage across its plates. The ECQ-E2125KFB also has to take into consideration the fact that the dielectric layer used in its construction can be subject to dielectric absorption, which is a phenomenon that causes the surviving electric charge to be restored to the device plates.

Due to its design, the ECQ-E2125KFB behaves like a resistor, with a low pass filter function. This means that the device is able to eliminate high frequency signals, leaving unaffected only those in the low frequency range.

Conclusion

The ECQ-E2125KFB is an example of film capacitor with a wide range of applications. This device is used for high-frequency or switch mode power supplies, timing and wave-shaping circuits in television receivers and various audio circuits, including noise reduction and EMI filtering. Its working principle is based on the fact that a capacitor stores energy in an electric field and that the device behaves like a resistor, with a low pass filter function.

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