EMC protection of USB applications: Page 4 of 4

April 17, 2015 //By Jochen Baier, Würth Elektronik eiSos
EMC protection of USB applications
The USB port has revolutionized PC peripheral devices and is becoming increasingly popular, for example in acquiring measurement data or installing software updates on machines. As a bus system for data transmission, it is found wherever mobile devices have to be connected. Although the connectors used in daily life may seem robust, those who develop USB applications must still not neglect protection of their interface.


Risks should be avoided in EMC-compliant design. It has to be ruled out that interference threatens the integrity of data communication - especially for data transmission via USB. EMC is not "nice to have" or used to satisfy regulations and standards, but is a quality feature. In order that EMC problems can be reliably excluded as early as in design, there are components tailored to the special conditions of fast data lines, which reduce the development workload and, above all, avoid reworks following critical EMC test results.

About the author: Jochen Baier is Head of Technical Marketing at Würth Elektronik eiSos.

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