RN218-1.4-02-10M

Common Mode Chokes

RN218-1.4-02-10M is a common mode choke, which has a broad application field and works through a specific working principle.

Application Field

Common mode chokes, like the RN218-1.4-02-10M, are used to filter signals in a variety of applications, including power electronics, telecommunications, aeronautical and aerospace systems, electronic and electrical engineering, and other high-tech industries. Common mode chokes are primarily used to decouple electromagnetic disturbances between two aluminum circuits: the common-mode and the differential-mode. They are also used in the reduction of power supply current and other multilayer IC design applications, thus enhancing the overall system signal-to-noise ratio.

These common mode chokes, like RN218-1.4-02-10M, are quite compact in size and can be integrated into a variety of designs, enabling very small components for shielding and filtering in tight spaces. Because they are small in size, they are often chosen for their low profile and can fit in places where other, larger chokes are not viable. They can also be used in a wide range of temperature conditions as they are designed to remain functional and effective in temperatures as high as 125°C.

Working Principle

Common mode chokes, such as RN218-1.4-02-10M, separate out the common-mode and differential-mode signals, balancing out any electromagnetic disturbances between the two signals and allowing only the passage of the differential-mode signal through the cores of the choke. This reduces the noise and excessive current that can cause system disturbances. As the choke only stops the common-mode signals, the differential-mode signals are still able to pass to the circuit, thus allowing the system to work properly.

In addition, common mode chokes are designed to work with very low DC resistances, allowing them to be particularly useful for decoupling purposes. This is because their high inductance values mean they are able to keep signal interference from affecting the devices over a longer period of time. The lower DC resistance also allows them to inherently reduce the conductance of the circuit, which reduces or eliminates loading effects on the supply line powering the circuit.

Ultimately, because common mode chokes like RN218-1.4-02-10M offer a wide range of benefits, they are often preferred over other types of components. Their compact size makes them ideal for applications that demand smaller solutions, and their high inductance and low DC resistance make them ideal for decoupling. In addition, the wide temperature range also makes them quite applicable to a host of different system requirements.