B82724A2142N001

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A Common Mode Chokes, such as the B82724A2142N001, is an electrical filter that provides electromagnetic interference suppression and noise reduction in electrically noisy circuitry. Common mode chokes are particularly useful in areas where data communications or sensitive instruments require noise-free signal transmission.

Application Field and Working Principle of B82724A2142N001

Application Field

The B82724A2142N001 Common Mode Chokes from EPCOS are single-phase filters for high-frequency interference suppression in input and output circuits. It provides excellent suppression performance in the frequency range from 2 MHz to 1 GHz, making it ideal for applications in particularly sensitive electronics, such as in medical equipment, IOT, Bluetooth and other wireless devices, automotive electronics, radar systems, and satellite receivers.

Working Principle

Common mode chokes are based on a simple principle. They usually feature two inductors connected in parallel with a common mode voltage applied to them. When a common mode voltage is applied, the two inductors are connected in parallel, which causes them to act as one inductor and creates a much higher impedance to the common mode signal. This allows the choke to effectively block common mode noise and reduce EMI radiation.

The B82724A2142N001 is constructed on a low-energy loss ferrite core with the two windings (a primary Ex and a secondary Ez) arranged in the form of an autotransformer. The windings’ end electrodes are connected to each other and to a non-magnetic terminal (middle electrode). In this configuration, the B82724A2142N001 provides effective common mode noise and EMI suppression, without significant increase in impedance to the differential mode current. The B82724A2142N001 is also designed to have a low temperature coefficient, which helps maintain its performance over a wide temperature range.

In summary, the B82724A2142N001 Common Mode Chokes from EPCOS provide excellent suppression performance, especially in the frequency range from 2 MHz to 1 GHz. They are perfect for applications in sensitive electronic components, such as medical equipment, wireless devices, automotive electronics, radar systems, and satellite receivers. They provide a high common mode rejection ratio without increasing the impedance to differential mode current.

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