RD7137-6-12M0

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Introduction

RD7137-6-12M0 is a type of Common Mode Chokes, which are widely used in signal or power line applications to reduce the extent of electromagnetic interference (EMI). Common Mode Chokes are a form of low pass filter that filters out high frequency, high energy currents that can produce disruptive interference in other electronic devices.

Application Field

Common Mode Chokes are commonly used in a variety of applications, including switching power supplies, electronic motor control circuits, pers servers, communication systems, and consumer electronics. Many common applications using Common Mode Chokes include:

• Power supply line filtering: Common Mode Chokes are used to reduce the EMI on the power lines between different circuits and devices.
• Communication line filtering: Common Mode Chokes are used to reduce the EMI on communication lines between different integrated circuits.
• Motor control line filtering: Common Mode Chokes are used to reduce the EMI on motor control lines between different switching circuits.

Working Principle

The working principle of Common Mode Chokes is based on the fact that the inductive reactance of an inductor increases with increasing frequency. This property of inductance is harnessed by Common Mode Chokes by introducing a large inductor in the path of the EMI noise.

When an EMI noise is introduced in the path of the chokes, the large inductor acts as a high pass filter, filtering out the high frequency, high energy noise. The choke also has a very low impedance to the DC current, ensuring that the desired low frequency, low energy signals are allowed to pass without attenuation.

The main components of Common Mode Chokes are the inductor, capacitor, and resistor. The inductor is the main component of the choke, responsible for attenuating the EMI noise. The capacitor is usually used to reduce undesirable parasitic inductances and capacitances, which can reduce the effectiveness of the choke. The resistor is used to limit the peak current through the inductor, allowing the choke to operate at higher frequencies.

Conclusion

Common Mode Chokes are used in a variety of applications to reduce the extent of EMI noise. RD7137-6-12M0 is an example of such a Common Mode Choke, which operates by introducing a large inductor in the path of the EMI noise. The choke also has a very low impedance to the DC current, ensuring that the desired low frequency, low energy signals are allowed to pass without attenuation.

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