7124-RC

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Common Mode Chokes, commonly known as EMI filters, are robust and reliable pieces of electrical equipment that improve the performance of digital and analog circuits by effectively reducing electromagnetic interference (EMI). Common Mode Chokes use two unique components to achieve this, a 7124-RC application field and a working principle. In this article, we’ll take a look at both in detail.

7124-RC Application Field

The 7124-RC application field is the raw material used to construct a Common Mode Choke. It is typically manufactured from ferrite core material that has been doped with either nickel-zinc (NiZn) or manganese-zinc (MnZn) particles. The doped ferrite material provides both effective magnetic permeability and a high resistance to environmental elements,making it an ideal choice for reliable EMI performance.

The 7124-RC application field is designed to provide low reactance power suppression of unwanted common mode current. The ferrite material that makes up the core is very efficient at blocking AC current, while simultaneously allowing the flow of DC current. The combination of high permeability and high-resistive properties makes this application field an ideal choice for use in applications where high power (+/-1.5kW) and low insertion loss (<0.3 dB) are critical.

Working Principle

Common Mode Chokes operate on a basic principle. When an AC signal is applied, it attempts to pass through the choke typically in the form of pulses of energy. By adding a ferrite material to the choke, the energy is diverted away from the circuit board, thus creating a low-impedance path. This low-impedance path acts to reduce the flow of unwanted common mode current, thereby reducing EMI.

In addition to the ferrite material, these chokes also use a metallic core material to form the inductor. This metallic core acts to further enhance the suppression of common mode current by providing an additional source of reactance. This in turn leads to a higher level of noise suppression and ensures reliable electrical performance.

In conclusion, Common Mode Chokes are pieces of electrical equipment that improve the performance of digital and analog circuits by effectively reducing electromagnetic interference (EMI). They use two unique components, a 7124-RC application field and a working principle, to achieve this. The 7124-RC is a ferrite-based material that acts to divert AC current away from the circuit board, while the working principle utilizes both ferrite and metallic core materials to achieve a higher level of noise suppression. Combined, these components make Common Mode Chokes an ideal choice for applications requiring high power and low insertion loss.

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