EMC regulation change to drive active filtering

EMC regulation change to drive active filtering

Market news |
By Nick Flaherty

A survey by Schaffner has shown continuing uncertainty around the industry’s readiness for the changing EMC regulations regarding the extension of compliance testing of devices down to 9 kHz.

The changes to the EMC regulations are set to drive the need for more active filtering rather than passive designs.

Nearly 90 percent of respondents see the phased-in extension down to 9 kHz will have at least some direct impact on their business. There is less certainty, however, about exactly how the legislation will affect current design projects, and what can be done now to accommodate the new design requirements the legislation required.

The lowering of the required testing and compliance range is being implemented because an increasing number of devices are causing potentially disruptive electromagnetic interference at the low end of the frequency spectrum.

The uncertainty is largely due to a lack of comprehensive information, and differing levels of understanding of what is currently known about the changes. The survey by Schaffner, which is being bought by TE, covers machinery and robotics; automotive; energy management and lighting.

To achieve compliance, the majority of survey respondents feel that they might need active filtering. However, 86 percent of them currently only use passive filtering techniques that they believe will be largely inadequate, and only half have access to facilities capable of testing to 9 kHz.

“Nearly three-quarters of the respondents to our survey who believe they will be impacted, said that they estimate it could take up to two years to ensure their new and existing products comply, so they want to be able to take action now,” said John Harrison, Managing Director of the Industrial UK business at Schaffner.


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