7121-RC

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Common Mode Chokes

Common Mode Chokes (CMC) is a type of electromagnetic inductor which is typically used in order to suppress or eliminate unwanted electromagnetic interference (EMI). Specifically, CMCs are used to eliminate common mode noise, i.e. noise which is present on two or more lines at the same time. This noise can be generated by a wide variety of sources, such as switching power supplies, electric motors, or electric components in an electronic system.

There are two distinct types of CMCs; One is a fixed chokes which is designed to provide suppression to a specific frequency wave (depending on the value of the inductor), and the other is an adjustable type which can be adjusted to different current levels.

The most common application field for CMCs is in computing. CMCs have become a standard component in almost all computers today, and are used in order to minimize the amount of interference caused by different components within the computer. CMCs are also used in many other electrical equipment, such as servers, routers, networking equipment, telecommunication systems, and medical instruments.

7121-RC Application Field and Working Principle

The 7121-RC series of Common Mode Chokes from ABC Co. are designed for a wide range of applications where a high-performance solution is needed. The 7121-RC CMCs feature a low impedance winding that works in conjunction with a specially designed shield for maximum common-mode noise suppression.

The 7121-RC CMCs are designed with an integrated ferrite core that helps to reduce magnetic hysteresis, resulting in better performance. In addition, the 7121-RC CMCs have a higher peak current rating than most other common-mode choke devices. This higher peak current rating can help to provide maximum protection, especially in applications where current levels can spike unexpectedly.

The working principle of the 7121-RC CMCs is very simple. When an alternating current is applied, the inductive windings will generate a magnetic field, which in turn will oppose the flow of the current. This opposition results in a decrease in the voltage amplitude of the current, thus reducing or eliminating any common-mode noise.

In summary, Common Mode Chokes are an important component in a wide range of applications, and the 7121-RC series CMCs from ABC Co. provide superior performance for high-speed, power sensitive designs. Their integrated ferrite core helps to reduce magnetic hysteresis, while their higher peak current ratings ensure maximum protection. They are an ideal solution for a wide range of applications that require high levels of noise suppression.

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