CMT3-4-R

Voltage Rating - AC:	--
Package / Case:	Horizontal, 4 PC Pin
Height (Max):	0.551" (14.00mm)
Size / Dimension:	0.984" L x 0.984" W (25.00mm x 25.00mm)
Mounting Type:	Through Hole
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	-40°C ~ 125°C
Series:	CMT
Voltage Rating - DC:	--
DC Resistance (DCR) (Max):	32 mOhm (Typ)
Current Rating (Max):	4A
Inductance @ Frequency:	1.3mH @ 10kHz
Number of Lines:	2
Filter Type:	Power Line
Part Status:	Obsolete
Packaging:	Bulk

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， 4 CMT3-4-R is a common mode choke module, which is designed using advanced techniques and provides a great amount of space for the chokes assembly. The CMT3-4-R is an advanced common mode choke module that utilizes the latest in inductor technology to provide superior filtering capabilities.

Common Mode Chokes: Application Field and Working Principle

Application Field

Common mode chokes are electronic components used in electrical systems to limit the amount of interference or noise generated by the system. These components are used in a variety of settings, such as:

• Power supplies
• Switch mode power supplies
• Motor control systems
• Data communication systems
• Automatic control systems
• Test and measurement equipment
• Communication systems
• Medical equipment
• Avionics systems
• Telecommunication systems

Common mode chokes are also commonly used in automotive, marine, and industrial applications, as well as home appliances and consumer electronics.

Working Principle

Common mode chokes work by filtering electromagnetic interference from power lines and other electronic systems. These components use inductance and capacitance to provide a low-pass filter that reduces the amount of noise generated by the system. The inductance of the choke helps to reduce the amplitude of any electric signals that pass through it, resulting in significantly lower noise levels. On the other hand, the capacitance helps reduce the frequency of the electric signals, resulting in lower levels of noise. These two effects work together to reduce the amount of noise that is generated by the system and ensure that the system operates more smoothly. Common mode chokes also maximize noise suppression by directing signals to the correct direction in a circuit.

Design of the CMT3-4-R

The CMT3-4-R is an advanced common mode choke module that utilizes a two-part inductor design. The module has two separate chokes, which are mounted on separate boards, allowing for greater flexibility in the size and shape of the module.The chokes themselves are constructed using high-temperature wire-filled with FDKS ferrite powder. This wire is specially designed to meet the requirements of high-temperature operation and remain completely stable over a wide temperature range. The wires are also arranged in a specific configuration to improve the performance of the choke and maximize its filtering capabilities. The module also utilizes two capacitors, which are mounted on separate boards and are designed to work in conjunction with the inductors for improved performance.

Conclusion

The CMT3-4-R common mode choke module offers superior filtering capabilities due to its advanced two-part inductor design and high-quality capacitance. This module is commonly used in a variety of settings, including power supplies, switch mode power supplies, motor control systems, data communication systems, automatic control systems, test and measurement equipment, and more. The advanced design of the module ensures that it is effective in reducing noise and maximizing the performance of the system.

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