EXC-28CG240U Filters

Voltage Rating - DC:	5V
Package / Case:	0804 (2010 Metric), 8 Lead
Height (Max):	0.024" (0.60mm)
Size / Dimension:	0.079" L x 0.039" W (2.00mm x 1.00mm)
Mounting Type:	Surface Mount
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Voltage Rating - AC:	--
Series:	EXC28
DC Resistance (DCR) (Max):	1.5 Ohm
Current Rating (Max):	160mA
Impedance @ Frequency:	24 Ohms @ 100MHz
Number of Lines:	4
Filter Type:	Signal Line
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

Common Mode Chokes are components designed to reduce EMI/RFI interference and improve power supply reliability by blocking sensitive signals or components from unwanted signals. The EXC-28CG240U is an example of such a product, which is used to reduce the noise transmitted between two different circuits based on the operating principles of current dividers.

Application Field

EXC-28CG240U Common Mode Choke is especially useful in computer power supplies, motor power supplies, industrial process control systems and many other types of electronic circuits. This type of choke is able to effectively suppress the common-mode noise generated by an alternating current and prevent the spread of the interference to other devices or systems. Common mode chokes are also applied for electromagnetic interference shielding, surge protection, harmonic filtering, power line filtering, and voltage regulation for different kinds of electrical and electronic components.

Working Principle

The EXC-28CG240U works by using the principle of a current divider. The two windings of this common mode choke are placed in series with the power supply which results in a current divider between the two windings. When a current flows through the windings, the currents in each winding are reduced to a fraction of the initial current depending on the number of turns in each winding. Thus, the noise generated by the alternating current is reduced in each winding. Additionally, due to the magnetic field generated by the current passing through the wires, the two windings attract each other. This attraction creates a physical barrier between the two circuits that reduces the amount of noise transmitted from one to the other. Consequently, the interference is reduced to a minimum inside the electrical system and the overall performance of the system is improved.

Conclusion

The EXC-28CG240U Common Mode Choke is commonly used to reduce EMI/RFI interference in many types of electrical and electronic systems. The current divider principle on which it works allows it to effectively reduce the noise transmitted between two different circuits. It can be used for electromagnetic interference shielding, surge protection, harmonic filtering, power line filteringand voltage regulation. Due to its effectiveness and popularity, it is an essential component in many modern industries and is used widely in computer power supplies, motor power supplies, and industrial process control systems.

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