744861100

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Common Mode Chokes, otherwise known as CM chokes, are inductive components that filter common mode noise of a current, also known as a current loop. CM chokes may also be used to provide protection from DC voltages and fast transients. Typically, these components are used in power-supply circuits, printed circuit boards, and communication systems. When used for filtering, they are also used to reduce the effective noise generated by signals, thus improving signal integrity.

The core of a CM choke comprises of a ferrite core which is split into two cores. These two cores are usually wound with two windings, also known as differential mode and common mode windings. Several turns of wire are wound on each core and the number of turns vary depending on the application. The most commonly used core is made out of ferrite material which is typically split into two cores before winding.

Each winding can be made up of a single wire, multiple wires, or braids. It is important to remember that the inductance values of the common mode and differential mode windings are typically not the same. This is because the core material is split into two separate cores and each core has to be wound with a different number of turns. The number of turns also depends on the impedance being applied to the filter.

CM chokes are most often used in power supply circuits, wherein a variety of components can be used to help reduce or filter out the common mode noise. This includes capacitors, inductors, resistors, diodes, and zener diodes. The purpose of these components is to provide a high level of isolation between the two windings, as well as provide a path for the differential current to flow.

For distributed applications, CM chokes are used for EMI/RFI attenuation. The purpose of EMI/RFI attenuation is to reduce the amount of noise generated by signals, thus improving signal integrity. Distributed applications, such as power supplies, printed circuit boards, and various types of communication systems, are important sources of EMI/RFI noise. Consequently, the CM choke is often used to absorb EMI/RFI noise and provide a high level of isolation between the system and outside noise.

The application field of 744861100 CM choke is diverse and includes switching power supplies, analog and digital systems, telecom and data networks, and industrial control systems. It also provides effective filtering to audio and video circuitry, as well as amplifier circuits. The choking capacity of this particular CM choke is rated to be able to attenuate up to 10 dB of EMI/RFI noise.

The working principle of the 744861100 CM choke is simple. As the differential current passes through the two windings, the magnetic field generated by the two cores induces a higher impedance to be applied to the signal. This higher impedance then attenuates the noise, improving the signal to noise ratio. Additionally, the CM choke also prevents the differential current from being carried outside the system, protecting all components from damage.

In conclusion, the 744861100 CM choke is a highly important component used for filtering out common mode noise and providing effective protection from DC voltages and fast transients. It is found in many applications and provides effective filtering for audio and video circuitry, as well as amplifier circuits. The working principle is simple, and the core is made out of ferrite material, split into two cores in order to provide effective filtering.

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