CM6149R-155

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Common Mode Chokes

Common Mode choke (CMC) is a type of choke used to reduce common mode noise, which consists of two electromagnetic coils. It is designed to suppress electromagnetic interference (EMI) in various applications with multiple frequency ranges. The CM6149R-155 is an example of a CMC. It is a high performance, passive EMI filter designed to attenuate conducted common mode interference in a wide range of applications.

Application Field

The CM6149R-155 is suitable for a variety of applications. It is commonly used in power, audio, telecommunications, automotive, and USB power applications. It is also used in high speed networks such as Ethernet, but it can also be applied to various other communication systems such as IEEE1394. Additionally, because of its high immunity, the CM6149R-155 is especially suitable for applications where there is a strong EMI environment.

Working Principle

The working principle of the CM6149R-155 is based on the principle of electromagnetic induction and mutual inductance. This passive device works by taking the EMI-generating current and diverting it through the two coils which are wrapped around a ferrite core. This magnetic field is then suppressed due to the inductive effect. As a result, the common-mode noise currents are reduced.

The CM6149R-155 has the advantage of having a wide operating temperature range of -40°C to +125°C, which makes it suitable for high temperature applications. It is also very resistant to external stress, with a maximum operation temperature of 125°C. Additionally, it has a -20dB typical attenuation at 100MHz and a -30dB typical attenuation at 1GHz.

When considering the applications for the CM6149R-155, it is important to note that it may not be suitable for all types of applications. It should be chosen for applications where noise suppression is required, such as power, audio, data, and automotive systems. It should also be considered for applications where there is a strong EMI environment.

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