ACM2012-402-2P-T002

Voltage Rating - AC:	--
Package / Case:	0805 (2012 Metric), 4 PC Pad
Height (Max):	0.051" (1.30mm)
Size / Dimension:	0.079" L x 0.047" W (2.00mm x 1.20mm)
Mounting Type:	Surface Mount
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Series:	ACM
Voltage Rating - DC:	50V
DC Resistance (DCR) (Max):	--
Current Rating (Max):	150mA
Number of Lines:	2
Filter Type:	Signal Line
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction:
Common mode chokes (CMCs) are one of the most universal type of electromagnetic interference filters. They have become increasingly important to the electric and electronics industry due to the increasing demand for higher levels of protection from electromagnetic interference. The ACM2012-402-2P-T002 is a type of ferrite CMC designed for use in automotive applications. It works by limiting the flow of common-mode noise currents through a winding while allowing differential-mode currents to pass, thus providing electromagnetic interference (EMI) protection. This article will explain the application field and working principle of the ACM2012-402-2P-T002 CMC.

Application Fields
The ACM2012-402-2P-T002 is a type of single-phase common mode choke designed specifically for use in low-frequency applications such as automotive powertrains, control systems, and lighting. The CMC’s ferrite construction makes it suitable for use in high temperature applications, particularly automotive under-hood conditions. The CMC’s low-profile surface mount package allows for easy integration into existing automotive powertrains, lighting, and control systems. The CMC’s rated inductances range from 5mH to 5mH, making it suitable for low-frequency applications with frequencies up to 20kHz. The CMC’s rated current ranges from 0.5A to 1.5A.

Working Principle
The ACM2012-402-2P-T002 operates on the principle of flux cancellation. The CMC is constructed with two windings, each wound in the opposite direction, allowing the CMC to effectively combat common-mode noise. The common-mode noise is generated when two signals with the opposite waveforms pass through the same line. This noise can interfere with the operation of the electronics in the automotive powertrain, lighting, and control systems. The CMC’s windings counteract the common-mode noise by creating a magnetic field that offsets it. This magnetic field restricts the amount of interference that can pass through the system, thus providing EMI protection.

Conclusion
The ACM2012-402-2P-T002 CMC is an important device for providing EMI protection in automotive powertrain, lighting, and control systems. The CMC’s ferrite construction makes it suitable for use in high temperature applications, and its low-profile surface mount package allows for easy integration into existing systems. The CMC works by creating a magnetic field that counteracts the common-mode noise, thus providing EMI protection.

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