CMX1211X132B-10

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Common Mode Chokes

Common Mode Chokes (CMCs) are electronic components used to control interference in electrical circuits, specifically to limit the common-mode or "ground-loop" currents on a wire or cable. CMCs can also be referred to as Common Mode Filters, Common Mode EMI Chokes, or Common Mode Line Noise Chokes.

One typical example of a CMC is the CMX1211X132B-10, known for its superior EMI performance in a wide range of applications. It is a multi-layer common mode choke specifically designed to suppress common mode and differential mode interference along with a wide temperature range.

Application Field

The CMX1211X132B-10 is commonly used in a wide range of applications, including automotive, medical, power, and industrial. It is ideally suited for high-speed data communication systems, power supplies, and industrial automation systems. Among its key strengths are excellent common-mode impedance characteristics up to 100 MHz, excellent high frequency characteristics, low leakage current, and wide operating temperatures.

It can also be used in signal line communication systems, such as USB, FireWire, and SCSI. In such systems, it can help minimize the susceptibility to outside interference, thus avoiding data interference.

Working Principle

The CMX1211X132B-10 works by creating a radial "basketweave" of several layers of high-impedance shielded winding. This design works to suppress both differential and common mode noise, thereby reducing interference. The choking characteristics are further enhanced by the multilayer construction, and by making sure there is no electrical contact between the windings.

In a typical application, the winding is connected across the lines of a USB, FireWire, or SCSI signal. As signals travel along those lines, the current pulses create an electromagnetic field, which can then be picked up by other nearby circuits. The CMC works by absorbing much of that field and suppressing it from further propagating.

The CMX1211X132B-10 also delivers excellent common-mode impedance characteristics up to 100 MHz, which helps improve signal quality and reduce EMI noise. Furthermore, its wide temperature range extends from -55 °C to 125 °C, making it ideal for high temperature applications.

Conclusion

The CMX1211X132B-10 is a revolutionary multi-layer common mode choke designed to provide superior EMI suppression across a wide range of applications. Its excellent high frequency characteristics, low leakage current, and wide operating temperature range make it an ideal choice for a variety of applications.

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