CM04RC05T

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Common mode chokes are an important class of electrical components that are used to filter transient voltage events in circuit applications. The CM04RC05T is a common mode choke commonly used for differential-mode signal filtering purposes.

Application Field

The CM04RC05T is a two-hole common mode choke designed for high-speed differential-mode noise filtering and signal isolation in communications equipment. Its low leakage current makes it suitable for applications in high-frequency switching power supplies, portable devices, automotive systems, and portable medical devices. In addition, its two-hole design and low size makes it suitable for applications where space is at a premium, such as in mobile phones and medical equipment.

Working Principle

A CM04RC05T common mode choke operates on the principle of mutual inductance. By utilizing inductor windings (coils) arranged side by side, this type of choke is able to filter out common mode EMI and undesired differential-mode noise that exists along a certain plane. This filtering action is achieved due to the magnetic flux created by one winding being induced into the other winding. Thus, as the current flowing through one winding grows, the flux will produce a counter EMF in the other winding, which in turn will reduce the amount of current flowing through the original winding.

In addition to mutual inductance, the CM04RC05T also utilizes magnetic shielding to further reduce noise interference. The shielding is achieved with a solid core (usually made of ferrite) that surrounds the two inductor windings. This serves to reduce any noise that might otherwise couple through the core material into either of the windings, further reducing the noise interference.

Common mode chokes are also used to help reduce any leakage inductance that might exist along the filter path. This is done by arranging the windings in a configuration that allows the leakage inductance to be mutually canceled out. This helps to ensure that, as the filter works to reduce EMI/RFI noise interference, it will also prevent any drop in voltage that might otherwise occur due to the leakage inductance.

Conclusion

The CM04RC05T is a common mode choke designed for high-speed differential-mode noise filtering and signal isolation applications. Its two-hole design and low size makes it suitable for applications where space is at a premium. The working principle of this choke involves mutual inductance and magnetic shielding, and it is also used to help reduce any leakage inductance that might exist along the filter path. With its many beneficial features, the CM04RC05T has become a popular choice for a variety of different applications.

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