CMT-8108

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Common Mode Chokes (CMC) are a type of inductive electronic component used to reduce the transfer of interference signals across two distinct electrical circuits. The CMT-8108 is a popular model of these devices, capable of suppressing line level noise on power lines up to 200 Volts, with a maximum applied current of 10 Amps. It is a particularly useful tool for designers dealing with audio systems, digital communication, and static discharge protection.

The CMT-8108 is known for its superior features and performance among CMCs. It has a high common-mode impedance across its full frequency range, making it an ideal choice for blocking signal disturbances from conventional medium-high frequency EMC sources. Additionally, the device has a high inductance with low DC resistance, which makes it an excellent candidate for suppressing digital communication noise with low distortion. In addition, its high rated current capacity provides protection from static discharge events, such as lightning and nearby power switching.

The basic working principle of the CMT-8108 is typical of other CMCs. Each coil is wound around a ferrite core that prevents the magnetization of the core material. The two coils are then connected, one in a series with a power supply, while the other is connected in parallel to the load. When inductance is applied, the core prevents the magnetic flux from flowing, which increases the impedance along the power lines. This impedes the transfer of noise signals, both common mode and differential mode, and thus provides a deterring effect against the induction of interference.

Most applications of CMCs are related to the protection of electrical or electronic circuits from signal interference. The CMT-8108 is most commonly used for its superior high frequency noise blocking and differential mode noise blocking abilities, thanks to its high common-mode impedance and inductance. Designers of audio systems and digital communication systems are often amongst the first to take advantage of such a device, as it can provide reliable protection from EMI events and static discharges.

The CMT-8108 is also a popular choice for power line protection from transient events, such as nearby lightning strikes or power switching. Its high rated current capacity, low thermal resistance, and tightly shielded windings make it an ideal candidate for these types of scenarios. The device is also most conducive for applications where physical space and reduced parts count are a major factor, given its minimal size and versatility.

The CMT-8108 Common Mode Choke is a versatile and powerful tool for the suppression of signal disturbances in power lines, digital communications, audio systems, and transient protection. Its high common-mode impedance and inductance make it ideal for blocking EMI sources from a wide range of frequencies, while its high rated current capacity ensures reliable protection from static discharge events.

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