DLFL-0147-25D2

Series:	DLFL
Packaging:	Bulk
Part Status:	Active
Filter Type:	--
Number of Lines:	2
Current Rating (Max):	25A
DC Resistance (DCR) (Max):	10 mOhm
Voltage Rating - DC:	--
Voltage Rating - AC:	440V
Operating Temperature:	-25°C ~ 100°C
Ratings:	--
Approvals:	--
Features:	--
Mounting Type:	Through Hole
Size / Dimension:	1.969" L x 1.969" W (50.00mm x 50.00mm)
Package / Case:	Radial

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Common Mode Chokes

Common Mode Chokes, abbreviated as CMC, is a type of inductor used on printed circuit boards (PCBs) to reduce the effects of electromagnetic interference (EMI). The purpose of CMCs is to reduce the level of transverse or “common” modes of signals carried on multi-conductor cables and other electronic paths that modulate and propagate the associated noise. It also protects sensitive equipment from the adverse effects of EMI, which can include degradation of signal quality or in extreme cases, permanent damage to the equipment.CMCs come in various shapes and sizes. The model of interest in this article is the DLFL-0147-25D2. This CMC has two distinct windings, referred to as the primary and secondary windings. The ratio of the output (secondary) to the input (primary) winding determines the CMC’s characteristic impedance. This value represents the critical effect the device has on the common mode impedance of the system, and in turn affects its ability to attenuate incoming noise.In terms of its application field, the DLFL-0147-25D2 is commonly used for broadband filtering. It is ideal for applications with signals that carry frequencies ranging from 50 KHz to 250 MHz. This CMC is often used to filter interference from power rails, on-board bus, data/signal lines and other high frequency lines. A notable feature is its wide differential impedance range of 8 to 1000 ohms, and a common mode impedance range of 0.2 to 100 ohms.The working principle of the DLFL-0147-25D2 is simple yet effective. It works by creating a barrier of inductance which obstructs the flow of high frequency current that is generated by disturbances in the signal path. The CMC also interferes with the synchronizing qualities of the disturbance waves, which turns them into inaudible static. This breaks the intensity of the signals and reduces their ability to propagate to other components.Furthermore, DLFL-0147-25D2 is equipped with a set of terminals that can be easily connected to the desired location. This allows the user to place it close to the source of the interference to reduce the level of signal loss from wire length and other physical variables.In summary, the DLFL-0147-25D2 is a high-performance common mode choke that can be used to reduce EMI interference in networks and on-board buses. Its wide differential and common mode impedance range makes it suitable for broadband filtering applications from 50 KHz to 250 MHz. Its simple working principle and easy to use terminals make it an ideal solution for a variety of applications.

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