Voltage Rating - AC:	250V
Package / Case:	Vertical, 4 PC Pin
Height (Max):	0.807" (20.50mm)
Size / Dimension:	0.945" L x 0.984" W (24.00mm x 25.00mm)
Mounting Type:	Through Hole
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	-20°C ~ 105°C
Series:	H
Voltage Rating - DC:	--
DC Resistance (DCR) (Max):	384 mOhm (Typ)
Current Rating (Max):	1A
Inductance @ Frequency:	10mH @ 1kHz
Number of Lines:	2
Filter Type:	--
Part Status:	Obsolete
Packaging:	Bulk

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Common Mode Chokes

Common mode chokes are components that are used for filtering out common mode signals from the AC power system. This type of filter is commonly used in industrial and commercial applications, as well as in consumer electronics.The ELF-18D431F is a good example of a common mode choke. This device is capable of filtering out any common mode signal frequencies within the range of 20 kHz-50 MHz. It is also designed to reject any alternating current (AC) noise, such as motor and electro-magnetic (EM) noises, from the AC power supply.The ELF-18D431F filter works by placing the coil vertically in a U-shape with the connected inductor wires (the choke) facing towards the power source. This creates an inductive coupling, which is what allows the filter to work.The inductor wires are then connected to a high-frequency alternating current (AC) capacitor. This capacitor is then connected to a low-frequency AC choke. The low-frequency choke is then connected to the power source. The combined effects of the choke and the capacitor are what create the filtering mechanism of the filter.When a signal is sent from a device to the power source, the choke blocks the low-frequency frequencies that would influence the current, while the capacitor blocks the high-frequency frequencies that would influence the current. This reduces the amount of noise that would otherwise be present in the signal.The ELF-18D431F filter can also be used as a noise suppressor. When the filter is placed between two devices, it can reduce the amount of interference that could otherwise occur due to a breakdown in the device\'s internal circuitry.In conclusion, the ELF-18D431F is a useful and versatile filter that can be used in many different applications. By using an ELF-18D431F filter, users can reduce the amount of noise and interference in their systems. This, in turn, can lead to smoother and more reliable operation of their devices.

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