ECW-F4225HL

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Film Capacitors

While ceramic capacitors have historically been favored for their low cost and ease of availability, film capacitors have grown increasingly popular over the years for their exceptional electrical properties and reliability. ECW-F4225HL is one of many film capacitors well suited for a variety of uses. This article will explore the ECW-F4225HL’s application field and working principle.

Application Field

ECW-F4225HL film capacitors are small, efficient capacitors primarily used in power electronics applications such as switching power supplies and LED lighting. Additionally, their higher temperature operating ranges allow their use in automotive applications, while their low impedance makes them suitable for low frequency filtering or wide compensation range. Because of their low equivalent series resistance (ESR) value, ECW-F4225HL film capacitors also provide great Ripple current capability and excellent AC response.

Description

ECW-F4225HL film capacitors are polypropylene and polyester dielectric material, available in a variety pack of values from 10uF to 4700uF. The capacitance range is from 1uF to 4700uF, with a wide range of capacitance values available within this range. The rated voltage, ripple current, and maximum leakage current all depend on the capacitance value, making ECW-F4225HL film capacitors highly customizable for any application.

Working Principle

Capacitors store electric charge inside a physical barrier, known as a dielectric, between two conducting plates. The two conducting plates feature electrical charges, either positive or negative, that create an electrostatic field. This field disperses the charge inside the capacitor to equalize both sides of the plates, allowing no current to be conducted. This process is known as capacitance, and it is measured in farads (F). When the electrical field of the capacitor is connected to a load, an electrical current can pass through the dielectric material. This current, however, is limited to the amount of the stored energy in the capacitor. This is what gives film capacitors the ability to act as a filter to reduce power fluctuations, or as a way of storing energy for later use.

Advantages

Film capacitors are highly regarded for their incredibly high insulation resistance, also referred to as permittivity. This allows them to store significantly more energy than their ceramic counterparts, and their higher temperature operating ranges make them ideal for automotive applications. These capacitors are also praised for their low ESR, which not only makes them more efficient in power applications, but also makes them better suited for low frequency filtering or compensation because of the larger capacitance range.

Conclusion

ECW-F4225HL film capacitors are highly reliable and efficient components that can be used in a variety of applications. With their wide range of capacitance values and operating temperature, ECW-F4225HL film capacitors have become the standard for many power electronics and automotive applications. Their extremely low equivalent series resistance, high permittivity, and rugged construction make them reliable options for complex applications.

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