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Common Mode Chokes

Common mode chokes are wide-band frequency reactive components that block the transfer of common mode signals between two points. The RD7137-36-0M5 is a common mode choke that has application in DC to 40 MHz differential mode frequencies. It is designed for differential mode/common mode filtering and EMI/RFI noise suppression.

Application Field

The RD7137-36-0M5 is used for controlling the high-frequency components found on the DC power supplies used in PCs, audio, video, and other computer systems. It can also be used in automotive systems, power generation equipment, telecom equipment, industrial controllers and other electrical control applications. It is also useful for filtering and noise exclusion in the industrial environment and in monitoring and controlling equipment.

The RD7137-36-0M5 is suitable for use as an input and output filter for all types of communications equipment. It is ideal for use in high-frequency differential mode applications such as power amplifiers, signal transceivers, modem, routers, PC and laptop systems, and digital and analog video & audio equipment. It can also be used as a line-level EMI/RFI filter for gaming consoles, signal measurer, oscilloscope, and switch mode power transmission lines. In addition, it can also be used as a common mode choke for protecting AC and DC circuits from interference. It is also used for preventing excessive current from flowing through differential mode circuits.

Working Principle

The RD7137-36-0M5 common mode choke operates using a principle called electromagnetic induction. In this principle, a magnetic field forms between two coils of wire when a current flows through one coil. When the current flows through the other coil, a voltage is induced in the second coil. This voltage is at a 90-degree phase angle relative to the current flowing through the first coil.

The RD7137-36-0M5 common mode choke has two coils, one of which is in a high-frequency signal path and the other in a common-mode signal path. The two coils are connected in series to create a choke that blocks common-mode voltage and current. When a differential-mode voltage is applied to the common-mode coil, the magnetic field created by the current in the differential-mode coil induces a voltage in the common-mode coil which is 90 degrees out of phase. This induced voltage creates an impedance that blocks the flow of common-mode signals.

The RD7137-36-0M5 common mode choke is designed to be very efficient at reducing common-mode noise, while allowing differential-mode signals to pass through with minimal losses. By blocking common-mode noise, it can help reduce EMI/RFI interference in sensitive electronic equipment. It can also be used to protect sensitive circuits from excessive current. In summary, the RD7137-36-0M5 common mode choke is an efficient and cost-effective way to reduce EMI/RFI interference and protect vulnerable circuits.

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