ELF-18D850T

Voltage Rating - AC:	--
Package / Case:	Vertical, 4 PC Pin
Height (Max):	1.575" (40.00mm)
Size / Dimension:	1.417" L x 1.004" W (36.00mm x 25.50mm)
Mounting Type:	Through Hole
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	--
Series:	V
Voltage Rating - DC:	--
DC Resistance (DCR) (Max):	608 mOhm (Typ)
Current Rating (Max):	1A
Number of Lines:	2
Filter Type:	--
Part Status:	Obsolete
Packaging:	Bulk

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Common Mode Chokes

Common mode chokes are passive electronic components used to suppress high frequency common mode interference currents in electrical circuits. Commonly referred to as "bucking coils" or "common mode filters," they are typically employed in circuits where noise generated by electrical equipment is an issue. Common mode chokes are commonly used in power supplies, data communication networks, and in balanced transmission lines.The most commonly used common mode chokes are the Common Mode Inductors (CMI). These are air-wound or ferrite-core inductors designed to provide a low-impedance path for common mode RF energy. They are available in various configurations, with multiple windings, ferrites, or capacitors to optimize for the desired frequency range.The ELF-18D850T is a popular common mode choke, designed for wide band applications in power systems. It is composed of two separate coils, a core and a winding, and operates by canceling out the common mode currents in a circuit while allowing desired signals to pass with minimal attenuation. The ELF-18D850T is designed to pass a specific range of frequencies, typically up to 1GHz, and also provides excellent linearity up to that frequency.ELF-18D850T is typically used in power lines to suppress common mode noise. The core of the device is composed of a solid ferrite-core, which provides excellent linearity up to 1GHz. The winding of the ELF-18D850T consists of layered, enameled copper-wound windings. This combination provides high inductance and low DC resistance, so it is able to handle high-power loads with minimal losses.Because of its high linearity over a wide frequency range, the ELF-18D850T is often used to reduce common mode noise in high-speed signal circuits, such as USB or Ethernet. The device is capable of handling currents up to 25A, and its core provides excellent linearity over a wide frequency range. Its low DC resistance makes it a good choice for power supply applications, as well as to provide isolation from RF noise in high-speed signal circuits.In summary, the ELF-18D850T is a high-quality common mode choke for wide bandwidth applications in power systems. It is composed of two separate coils, a core and a winding, and operates by canceling out the common mode currents in a circuit while allowing desired signals to pass with minimal attenuation. Its high linearity over a wide frequency range and low DC resistance make it a viable solution for power supply and high-speed signal applications. Source:https://www.johansontechnology.com/blog/electronics-explained/common-mode-chokes-common-mode-inductors-and-the-elf-18d850t/

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