750312184

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Common Mode Chokes

Common mode chokes, also known as CM chokes, are widely used to reduce or eliminate the common mode interference of signals, or the impact of high frequency signals on the power line. These chokes are basically passive components, which make use of the magnetic flux generated in the narrow winding portion to the right or left of the component body to intercept the common mode interference signal.

750312184 Application Field and Working Principle

750312184 is a high-performance common mode choke produced by global electronic component manufacturer TDK. This product has a high cost-performance ratio and is suitable for Audio/Video and HDMI cables, computer and USB cables, and all kinds of RF antenna cables. It can effectively reduce the common mode interference in the transmission pipeline, as well as reduce the signals interference from the outside world.

The working principle of 750312184 is basically the same as other common mode chokes. The product consists of two symmetrical windings (bifilar windings). During operation, these windings are symmetrically connected, forming a closed loop. The magnetic field generated by the current in the winding induces a current in the other winding. This current is the reverse of the current produced in the other winding, to reduce the common mode interference.

In this closed loop, in addition to the reverse induced current generated in response to the external interference, there is also an inductance component, which makes the product become a kind of electromagnetic chocked component. This chocked component is able to converts the frequency of the current, thus damping or absorbing the common mode interference signals.

Due to the unique shape of the winding, the product has a high common-mode impedance in a wide frequency range, with some commercial components can supposedly reach up to 600ohm~3000 ohm. This product also has wide temperature tolerance, and different core materials can provide excellent quality at temperatures as low as 0.05K (-273 degrees Celsius). Of course, there are also high-performance products with even more excellent specifications.

In this way, 750312184 effectively reduces the common mode interference in the transmission pipeline, and can perform excellent in a wide range of applications, including HDMI cables, computer and USB cables, RF antenna cables, etc. This product is well-suited as a common mode filter for high-speed signals, and can also be used as an IC shielding device for low-frequency signals.

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