CME375-7 Filters

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Common mode chokes are electrical components used in power electronics and electronic circuit designs to provide a low-impedance path to common-mode noise. The CME375-7 is one such inductor, and it is a type of three-terminal EMI-filtering component. The CME375-7 offers a high level of performance, compatibility, and reliability. Its design incorporates a high frequency, high common-mode rejection for noise reduction, as well as a low DC resistance that helps minimize secondary winding voltage drop.

The CME375-7 is used as an EMI filter in a wide variety of applications, ranging from telecommunications to industrial electronics, computers, consumer electronics, and automotive markets. It is suitable for both new and retrofit designs. It features three-terminal construction and is optimized for use in the frequency range of 10kHz to 1MHz.

The CME375-7 works on the principle of inductive reactance. In this case, the inductance is computed from the formula: L=2πfμ0/N2, where f is the frequency, μ0 is the permeability of free space, and N is the number of turns in the winding. The impedance of the inductor is expressed as the ratio of the inductive reactance, Xl, to the total resistance: Z=Xl/R.

The CME375-7 uses a shielded core structure to reduce the amount of electromagnetic interference (EMI) in a system. The construction consists of a ferrite core, a two-level shield, two windings, two plastic spacers, and a metal shield. The thermal performance of the CME375-7 also helps reduce EMI. It has a good heat dissipation rate of 0.25W/cm2, which helps to reduce the rate of temperature rise.

A key advantage of the CME375-7 is its strong common-mode noise rejection. The device has a high common-mode impedance ratio of up to 80dB at 1MHz. This high ratio helps isolate the equipment from interference caused by external EMI sources, such as power line noise. This high level of shielding also helps reduce crosstalk between various circuitry, which helps improve system performance.

The CME375-7 also has good shelf life and vibration resistance. Its low core loss helps maintain low temperature rise and reliability. Together, these features ensure good high-frequency performance.

The CME375-7 is ideal for use in a wide range of applications, including telecommunications equipment, automotive, industrial control, and consumer electronics. It provides a robust, high-performance solution for EMI filtering. Additionally, its high common-mode impedance ratio helps reduce EMI interference and crosstalk, ensuring high-quality performance in a wide variety of applications.

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