CMT-02107

Series:	CMT
Packaging:	Bulk
Part Status:	Obsolete
Filter Type:	--
Number of Lines:	2
Inductance @ Frequency:	7mH @ 1kHz
Current Rating (Max):	1A
DC Resistance (DCR) (Max):	500 mOhm
Voltage Rating - DC:	--
Voltage Rating - AC:	250V
Operating Temperature:	--
Ratings:	--
Approvals:	--
Features:	--
Mounting Type:	Through Hole
Size / Dimension:	1.102" L x 0.571" W (28.00mm x 14.50mm)
Height (Max):	1.102" (28.00mm)
Package / Case:	Vertical, No Base, 4 PC Pin

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Common Mode Chokes

Common mode chokes (CMC) are components used in the suppression or elimination of electromagnetic interference (EMI) and radio frequency interference (RFI). They are also sometimes referred to as common mode filters (CMF), or interference filters. CMCs are typically used in applications where strong electromagnetic fields are present, such as radiofrequency (RF), power, and control systems. They work by minimizing or eliminating common-mode currents, hence their name.CMCs come in a variety of sizes and shapes, ranging from small surface-mount devices suitable for circuit board applications, to large wall-mounted assemblies designed for external noise suppression. A typical choke consists of an inductively-coupled coil, which is made up of wire wound into a spiral or helical shape. The coil is often wound with a deposited layer of conductive or non-conductive material, which provides additional shielding and improves performance.The CMT-02107 is a common mode choke designed for medium-to-high frequency EMI suppression. It is designed to provide high performance in a wide range of applications. Its inductance range is 0.37 µH to 0.78 µH, and it is available in surface mount packaging. It is suitable for use in a wide range of applications, such as cellular phones, digital camcorders, and HDTVs.The basic working principle of common mode chokes is to create an impedance, or opposition, to the common-mode current, which is the unwanted current that flows along the same conductor. This impedance is created by winding a wire coil around a magnetic core. The core material determines the voltage rating and inductance of the device. As current flows through the coil, it induces an opposing field in the core, which opposes the common-mode current. As the opposing fields increase, they reduce the ability of the common-mode current to pass through the core, and the coil acts as a pulse-damping choke. By reducing the amount of common-mode current, the EMI present in the signal is also reduced.In addition, CMCs also provide radio frequency interference (RFI) suppression. When the choke is placed in close proximity to an RFI signal, the induced current in the coil serves to create an electromagnetic shield, which can further reduce the amount of interference in the system.CMCs, such as the CMT-02107, are also designed to provide high performance in high temperature environments. The core material and special packaging techniques provide increased thermal stability, allowing them to perform reliably even in extreme temperature and humidity levels.In summary, CMCs are used to suppress and eliminate EMI and RFI noise. The CMT-02107 is a high-performance common mode choke designed to eliminate EMI and provide RFI suppression. It has a wide inductance range, and is suitable for use in high-temperature environments. Its working principle is that of inducing an opposing field to the common-mode current, which reduces its ability to pass through the core, hence providing effective EMI and RFI suppression.

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