ELF-21V008A

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Common mode chokes are specialized electronic components that play an important role in the world of electronics. They are used in various applications to minimize the flow of common-mode noise currents in a circuit. One such common mode choke is the ELF-21V008A. This article will give an overview of the ELF-21V008A application field and working principle.

The ELF-21V008A is a common-mode choke coil designed for use in EMI applications. It features high temperature stability and excellent attenuation of common-mode noise. It is also designed with a low internal resistance, allowing it to provide superior common-mode noise attenuation while consuming less energy. The ELF-21V008A is available in two winding configurations: a single-winding version and a dual-winding version. The single-winding version provides higher performance when used with lower frequency noise, while the dual-winding version provides better attenuation for higher frequency noise.

The ELF-21V008A is designed for use in a variety of applications. Typical applications include: Ethernet, USB, storage interface, digital audio and video circuits, automotive applications, power supplies, and LCD monitors. It can also be used for EMC applications in industrial equipment, telecommunications systems, and medical equipment.

The working principle of the ELF-21V008A is based on Faraday’s law of electromagnetic induction. When an alternating current (AC) passes through the coil, it induces an electromagnetic field. This field interacts with the coil’s inductance to create an electrical current. This current produces an opposing magnetic field, which then cancels out the original AC signal, attenuating the noise. This process is known as “Common Mode Rejection.”

In addition to attenuating noise, the ELF-21V008A can also be used for filtering, providing improved signal integrity and power quality. It can also be used for low-profile circuit protection, and it can be combined with other EMI mitigation components to create a complete EMI solution.

In conclusion, the ELF-21V008A is a versatile common-mode choke that can be used for a variety of applications. It features high temperature stability and excellent attenuation of common-mode noise. It works on the principle of Faraday’s law to provide superior common-mode noise attenuation while consuming less energy. The ELF-21V008A is available in single- and dual-winding versions to provide improved reliability and performance in different applications.

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