CMT-8121-B

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Common Mode Chokes (CMC) are electronic devices used to limit the amount of current or voltage that can be transmitted along a conductor, side by side with the desired signal. This type of choke is effective at eliminating common mode noise. CMCs are also known as common mode filters.

The CMT-8121-B is a standard type of CMC that is typically used in broadcast and communications systems to reduce unwanted crosstalk. It has a high signal-to-noise ratio (SNR) and provides an effective way to limit the amount of electromagnetic interference (EMI) that can travel between two systems. The device is enclosed in a 19mmx7.5mmx7.7mm aluminum housing with a simple pin configuration. It is designed to operate over a wide range of temperatures, from -40°C to +85°C.

The primary function of the CMT-8121-B is to reduce common mode EMI by rejecting noise and effectively blocking common mode currents. Its working principle relies on the laws of electricity, such as Faraday\'s law, which states that the voltage change across an inductor is directly proportional to the rate of change of the current through it. By using the choke’s inductance to limit the rate of current change, it effectively reduces the amount of EMI that can pass through. This ensures a higher level of signal integrity for both transmit and receive signals.

The CMT-8121-B is primarily used in audio/visual designs including wireless communication systems. It’s ideal for applications where common mode EMI rejection is needed, such as cable television systems, video surveillance systems, RF communication systems, and antenna systems. It is also used in power supplies to reduce the amount of EMI that can affect the electronics in an equipment cabinet.

The CMT-8121-B is a robust, reliable, and cost-effective way to reduce common mode EMI in broadcast and communication systems. Its simple pin configuration and small size make it easy to install and maintain. With its high level of signal integrity, it ensures accurate and consistent data transmission in any system.

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