ELF-18D620

Voltage Rating - AC:	250V
Package / Case:	Vertical, 4 PC Pin
Height (Max):	0.925" (23.50mm)
Size / Dimension:	1.122" L x 1.142" W (28.50mm x 29.00mm)
Mounting Type:	Through Hole
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	-20°C ~ 105°C
Series:	H
Voltage Rating - DC:	--
DC Resistance (DCR) (Max):	2.448 Ohm (Typ)
Current Rating (Max):	400mA
Inductance @ Frequency:	100mH @ 1kHz
Number of Lines:	2
Filter Type:	--
Part Status:	Obsolete
Packaging:	Bulk

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Common Mode Chokes, abbreviated as CMC, are the most common type of electric choke utilized in a wide variety of power and electrical conditioning applications. The ELF-18D620 is a type of CMC, specifically designed for use in high power applications such as AC and DC motor drives. It is used to reduce and suppress common-mode noise generated by power electronic or electrical devices operating in different power line conditions. In a nutshell, the ELF-18D620 works through coupling, isolating, and protecting two-wire circuits from high-frequency noises emitted from these devices. It also ensures proper electrical balance between the two-wire circuits. It is very important for data protection, which is why it is widely used in industrial applications. Their application fields include AC and DC motor drives and power converters, rectifiers, inverters, and solar energy systems. More generally speaking, CMCs are used in any application that requires electrical power control, conditioning, and protection. The working principle of CMCs is based on the phenomenon of electromagnetic induction. It consists of an inductor and a small capacitor, and two wires connected in the form of a two-wire circuit. The inductor is connected to the power line and to a single or multiple electrical devices, while the capacitor is connected between the two wires. In the presence of incoming AC or DC power currents, an electrostatic shield is created between the two wires. This shield acts as a noise-reducing barrier, blocking high-frequency currents created by the AC or DC power source and simultaneously suppressing them. The electrostatic shield is also capable of cancelling out any residual currents created by the device that might be transmitted back into the power line. Overall, the ELF-18D620 CMC is an effective and reliable device for noise reduction, power conditioning, and data protection. It is designed to allow for safe operation in high power applications and to provide a secure, reliable electrical connection in those applications. With the capability of blocking high frequency currents and suppressing residual currents, this device is an indispensable part of the modern power system.

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