CMT908-V3

Voltage Rating - DC:	--
Package / Case:	Vertical, 4 PC Pin
Height (Max):	1.500" (38.10mm)
Size / Dimension:	1.450" L x 0.800" W (36.83mm x 20.32mm)
Mounting Type:	Through Hole
Features:	ESD
Approvals:	--
Ratings:	--
Operating Temperature:	--
Voltage Rating - AC:	250V
Series:	CMT
DC Resistance (DCR) (Max):	120 mOhm
Current Rating (Max):	3.2A
Inductance @ Frequency:	8mH @ 10kHz
Number of Lines:	2
Filter Type:	Power Line
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

Common Mode Chokes, also known as CMCs, are electrical devices used to suppress electromagnetic interference (EMI). The CMT908-V3 is the newest member of this family and is designed for high-frequency and EMI filtering applications in particular. It features a wide operating temperature range and accurate tuning capabilities.

Applications

The CMT908-V3 is applicable to a wide range of industries and devices. It is designed for applications over 100MHz, particularly those that involve EMI suppression. These include power supplies, oscilloscopes, automobile electronics, PDAs, medical instruments, and communication systems.

Benefits

The CMT908-V3 offers numerous advantages over traditional CMCs. Its wide temperature range allows for reliable performance in a variety of extreme environments. It is also highly accurate, achieving a tuning resolution of 0.025 inches between pins. Finally, the CMT908-V3’s low profile and small size allow for use with minimal space constraints.

Design

The CMT908-V3 is a multi-stranded common mode choke. It includes an internal structure made of a high-frequency Litz wire that is wound around a high-frequency ferrite core. The design of the Litz wire ensures it has low resistance and high current carrying capacity, while the ferrite core provides a high magnetic permeability and high coercive force. This combination allows for very low EMI emission levels, while also providing excellent noise suppression.

Working Principle

The primary function of the CMT908-V3 is to suppress EMI. To do this, the common mode choke uses its Litz wire design to create an inductive field. This field works to reduce the amplitude of any EMI signals, while simultaneously increasing the DC resistance of the line. This results in the EMI being reduced to a level that is suitable for the given environment.

Conclusion

The CMT908-V3 is a common mode choke designed for high-frequency and EMI suppression applications. Its wide operating temperature range and accurate tuning capabilities make it well suited for use in a wide range of industries and devices. Through its Litz wire and ferrite core design, the CMT908-V3 is able to reduce EMI to a satisfactory level, making it an ideal choice for any application requiring EMI prevention.

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