B82796C513N201

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Common Mode Chokes

Common mode choke (CMC) is a type of inductor with multiple windings and is the devices of choice for suppressing common mode noise in power and data transmission applications. The B82796C513N201 is a typical common mode choke and its application field and working principle are discussed in the following description.

The B82796C513N201 falls under list of broadband common mode chokes for multi-pair cables. It was introduced by EPCOS for applications such as local area networks (LAN), which often require energy-saving solutions that also meet the high demands of data transmissions. This broadband common mode choke has a low insertion attenuation and an impressively high attenuation near the cutoff frequencies, allowing for a quick and efficient suppression of current surges associated with Ethernet operation as well as other types of high-speed data transmissions.

The B82796C513N201 also includes an integrated ESD protection (electrostatic discharge) and is designed to be used in 10Base-T, 100Base-TX, E1/T1, and IEEE 1394 data applications. Its combination of interference suppression characteristics and current ratings makes it suitable for use in a wide range of industrial and consumer applications, including communication cables with balanced and unbalanced data lines, power supplies, and various computer-related products.

In terms of working principle, CMCs are constructed with three regions: core, windings, and contacts. The core is made of magnetically permeable material and serves as the inductive component of the filter. It is the only component that contributes to the inductance of the choke and is responsible for the amplitude of the desired filter characteristics. The windings are the primary installation points for connecting the braid/shield and the signal wiring. The contacts are the mechanical connection points between the choke and the system. The contacts provide the electrical connection between the choke and the system.

The B82796C513N201 common mode choke consists of three separate windings, one on each of the corresponding core regions. These windings are electrically independent but the magnetic fields created by each winding add up to form an inductance and this inductance helps filter out high frequency interference. Furthermore, this choke offers filtering at higher frequencies than standard common mode chokes for lower insertion losses. The windings are separated with the help of a barrier; this prevents the two windings from interfering with each other. It also allows the common mode choke to handle higher currents and take advantage of larger inductances.

In summary, the B82796C513N201 common mode choke has been designed to offer excellent attenuation performance at low frequencies, while offering a low-frequency differential mode bypass to reduce insertion losses in data transmission applications. Its windings provide the inductance required to filter high-frequency interference, and its integrated ESD protection minimizes the interference caused by accidental shocks. Its multiple windings and barrier configuration allow it to handle higher currents and larger inductances, making it an ideal choice for high-speed data applications.

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