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Würth Elektronik Expands EMC Filtering Solutions



May 22, 2020


Würth Elektronik now offers WE-CLFS EMC Line Filters, which include the components needed for an EMC filter inside of a welded enclosure to improve shielding. All WE-CLFS filters have at least 65dB of peak attenuation, and come with UL and VDE certifications, which ensures safety requirements are already factored into the design. With 3 different types available: single stage, single-stage advanced, and two-stage, with options of with a rated current up to 20A.

Another solution is the Design Your EMC filter series, which provides a fast and cost efficient opportunity to set up different filter designs. Afterwards testing them in the EMC laboratory can take place without having the unpleasant task of performing a redesign every time. The new “Design Your Own EMC Filter” kit includes different common mode chokes (CMCs), X capacitors, Y capacitors, and connectors, as well as a booklet including pre-determined filters that eliminate calculations and component selection. This kit enables the user to assemble a working EMC filter during design.

For the off-the-shelf power supply’s radiated emissions, a cable ferrite is the easiest solution. Würth Elektronik’s free component selection tool, REDEXPERT, allows users to sort through all cable ferrites, including parts to fit specific cables, to find the best solution in just a few seconds.

Design Kit Features

  • Test-PCBs offer an easy way to build up a line filter
  • Common mode chokes suppress common mode noise
  • X-Capacitors short differential mode noise to neutral
  • Y-Capacitors short common mode noise to ground
  • Resistor discharges X-Capacitors

More information on the WE-CLFS line filter

Design Your EMC Filter Kit


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