B82731M2901A030

Common Mode Chokes (CMCs) are utilized in a number of electrical applications, where their function is to reduce conducted common mode noise from one side to the other. This is done by using various types of iron powder core inductors, typically split in two pieces, to reject interference from external interference sources, such as power lines or other types of transients. One example of the CMCs is the B82731M2901A030 CMCs.

The B82731M2901A030 CMCs are specially designed to reduce EMI (electromagnetic interference) from power lines and transients, with an attenuation of over 40dB to 70GHz in the 4.2GHz frequency range. It is made from two separate components, consisting of a two-wire cord with four separate jaws, and an inner magnetic core which houses the two iron powder cores. The two iron powder cores are separated by a thin layer of insulation, such that they will only be affected by interference from external sources and not by the other core.

The working principle of the B82731M2901A030 CMCs is based on the magnetic flux generated by the two iron cores. When an interference source is present, the magnetic flux is disturbed, resulting in a "leakage" of current through the core. This leakage of current is referred to as "common mode noise", and is the primary source of Electromagnetic Interference (EMI) that must be suppressed. The attenuation of the CMCs is provided by the combined action of all the components, which work together to reduce the amount of EMI entering the system.

The B82731M2901A030 CMCs are utilized in applications such as power supplies, automotive and data storage power supplies, medical instrumentation, and others. They are typically incorporated into the power supply design, but can also be used as a stand-alone component for suppressing EMI. The CMCs are capable of rejecting a wide variety of EMI, including both conducted and radiated EMI, and they are capable of providing a significant amount of attenuation over a wide range of frequencies. In addition, they are also able to reduce conducted reflections, and as such, they can be used to further reduce system noise levels.

In conclusion, the B82731M2901A030 CMCs are a highly useful tool for reducing EMI from external sources and other transient events. They provide an effective solution to reducing conducted and radiated EMI, and they are capable of providing a significant level of attenuation over a wide frequency range. As such, they are an important component in reducing system noise levels in many different applications.