DLW5BTM251SQ2L Filters

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Common mode chokes are electromagnetic components used to reduce the level of differential electromagnetic interference (EMI) propagated in a system. Common mode chokes are characterized by their ability to produce very high levels of inductance when applied in a differential mode, which serves to reduce voltage levels on their respective differential current paths. The DLW5BTM251SQ2L is a common-mode choke from TDK Lambda. This particular model of common-mode choke is capable of providing a comprehensive range of electrical and mechanical features that are particularly well-suited for applications requiring EMI protection.

Application Field and Working Principle

The DLW5BTM251SQ2L was specifically designed to provide EMI protection for telecommunication, network and consumer electronics applications. Its use in these application fields is possible due to its high inductive value of 25µH, low ripple, and low loss of less than 1dB at 3MHz. Additionally, its high differential mode attenuation ranges from 35dB@50MHz to 25dB@500MHz and its common mode attenuation ranges from 55dB@50MHz to 25dB@500MHz, which results in superior EMI protection.

The DLW5BTM251SQ2L common-mode choke operates by creating a high-inductance path for differential currents. This means that the current must flow in the same direction in order for it to travel through the winding for the full length. This prevents the current from traveling around different loops or paths, which prevents unwanted flux from being produced. It also creates a high-resistance path for common-mode currents, since the inductance of these chokes is too strong for the current to travel through them. This allows the current to divert, decreasing the amount of unwanted flux in the system.

The DLW5BTM251SQ2L common-mode choke is a compact, low cost, and highly efficient solution for EMI protection. It provides an extensive attenuation range, with high inductive values that make it well-suited for telecommunication, network, and consumer electronics applications. With its low ripple, low loss, and superior EMI protection, the DLW5BTM251SQ2L is the perfect choice for EMI applications.

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