PA4040.001NL

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Common Mode Chokes

Common mode (CM) chokes are transformer-like device used to suppress high frequency electromagnetic interference (EMC) in electronic circuits. The PA4040.001NL is a type of CM choke specifically designed to suppress differential line signals, with a common-mode signal of up to 400mV. This provides a reliable way to reduce electromagnetic interference from sources such as switching power supplies, motors, and other high-frequency noise sources.

Application Field

The PA4040.001NL is often used in systems that require the highest levels of noise suppression. Examples of uses include switch mode power supplies, motor drives, switch mode lighting, DC-to-DC converters, and in various automotive applications. It is particularly useful in applications where high isolation, and small size are important.

Working Principle

The PA4040.001NL is a common mode choke that works on the principle of cross-referenced flux cancellation. This is accomplished by winding two wires on the same magnetic core, and connecting them in series. When current flows through the choke, an oppositely wound flux is created. The resulting mutual inductance cancels out any common mode signals, while allowing the differential signals to pass through unaffected.

In particular, the PA4040.001NL is designed to provide 400mV of common mode noise suppression. This is accomplished by using a specially designed magnetic core material, with very low leakage inductance. The resulting low-noise CM choke provides excellent performance in the most demanding applications.

Conclusion

The PA4040.001NL is a common mode choke specially designed to suppress differential line signals, with a common-mode signal of up to 400mV. By using a specially designed magnetic core material, and very low leakage inductance, the PA4040.001NL is able to provide excellent noise suppression. It is particularly useful in applications where high isolation, and small size are important, and is often used in switch mode power supplies, motor drives, and various automotive applications.

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