CMF23H-473111-B

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Common Mode Chokes, or CMC, are a type of filter inductor used to reduce electromagnetic interference (EMI). They are often used in applications that require better signal integrity or to reduce frequency-dependent currents. The CMF23H-473111-B is an example of a common mode choke designed to reduce the emission of common mode current over a wide frequency range.

The CMF23H-473111-B has a 3-section construction which utilizes a combination of ferrite core and air gap to reduce common mode current to the desired level. The ferrite core is a magnetic material composed of two or more layers of ferrite material, which have been carefully selected and stacked in a specific orientation to create an inductor with a high self-resonant frequency. Air-gap coupling allows the CMF23H-473111-B to maintain a low impedance over a wide frequency range.

The primary function of the CMF23H-473111-B is to suppress common-mode currents, which are typically observed on high-speed digital lines in systems with a significant EMI profile. The choke is designed to allow the passage of differential-mode current, while significantly attenuating any common-mode current. This reduces the potential for EMI radiation, which can lead to decreased system performance and signal integrity.

The CMF23H-473111-B is typically used in applications such as data transmission, CATV systems, power supplies, industrial control systems, and digital audio systems. The choke is suitable for applications where common mode current is coming and going on both lines of a signal pair. The 3-section construction also allows for the use of the choke in applications where the current may be coming and going on one line only.

The working principle of the CMF23H-473111-B is quite simple. It is based on the fact that the ferrite core and air gap create an inductive effect that opposes the passage of current. The inductance of the CMF23H-473111-B is adjusted to the frequency range of the common-mode current, thus significantly reducing the amount of current passing through the device. This reduces the amount of EMI radiation and improves overall signal integrity.

In summary, the CMF23H-473111-B is a high-performance common mode choke designed to reduce EMI. It is composed of a three-section construction, which utilizes a combination of ferrite core and air gap to reduce common mode current. The choke is suitable for use in applications such as data transmission, CATV systems, power supplies, industrial control systems, and digital audio systems. The working principle of the CMF23H-473111-B is based on the inductive effect created by its ferrite core and air gap, which reduces the amount of current passing through the device and results in improved signal integrity.

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