ELF-21N024A

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Common mode chokes are used to block high frequency common noise signals on system lines, reducing the system\'s electromagnetic interference (EMI) and increasing the system\'s transient immunity. The ELF-21N024A is a specific type of common mode choke for limiting common modes in power systems and provides excellent differential/common mode high frequency noise suppression.

The ELF-21N024A is a bi-directional common mode choke thanks to its electro magnetic interference (EMI) filter winding structure, which consists of two electro magnetic cores and four windings that limit high frequencies along the entire power line. The winding structure of this bi-directional filter ensures a high-performance shield design, which reduces the systemwide level of EMI, especially point-to-point EMI. Furthermore, this filter\'s design also minimizes stray capacitances, which are common sources of EMI in the system, further reducing the system\'s EMI level.

The ELF-21N024A is generally used for the suppression of the common mode current on power supply lines. It functions by blocking high frequency common noise signals that come from external sources or a system\'s internal sources. This works by providing an energy-balanced path through the windings of the EMI filter, reducing the amount of common mode current in the system.

The ELF-21N024A has a variety of applications in power electronics systems, such as in automotive electronics, switch-trend 1/2/4 supplies, and instrumentation systems. It can also be used in highvoltage and low-voltage power supplies, as well as medical and telecommunication systems. In automotive systems, it is used to improve the noise immunity of power supply lines and reduce errors in controller communication.

In terms of its working principle, the ELF-21N024A is basically an inductor. When the power line is switched on, the current flows through the inductor, which creates a magnetically coupled interaction between the windings of the filter. This magnetic coupling creates an energy-balanced path for the common mode current to flow through, resulting in the suppression of the common mode current. When the power line is switched off, the current stops flowing and the magnetic coupling is broken. This results in the stopping of the flow of the common mode current and thus a reduction of common mode noise.

Overall, the ELF-21N024A is a type of common mode choke to reduce common mode currents. It is used mainly in automotive systems, switch-trend 1/2/4 supplies, high-voltage and low-voltage power supplies, instrumentation systems, medical, and telecommunication systems. This filter works by creating an energy-balanced path for the common mode current to flow through, resulting in the suppression of the common mode current.

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