---- December 3rd 2024 ----
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CAGE Code: 5DME2
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AppNotes - Understanding EMC Stands and Specifications Page 1


Interference Protection Standards
Until recently most countries have had their own regulations and standards governing electro-magnetic interference (EMI) or radio frequency interference (RFI). However, on the 1st of January 1992, the European Directive 89/336/EMC on electro-magnetic compatibility (EMC) came into force. This directive brings a common approach to EMC to every member state of the European Union. Fig.1 shows the EMC concept.



Common standards will be used throughout Europe to ensure that technical trade barriers are removed. As well as controlling EMI emissions from equipment, the directive also calls for equipment to be immune to external electro-magnetic disturbances.
The task of elaborating the standards to be used has given to the European organization called CENELEC. The member countries of CENELEC are:
Austria
Belgium
Denmark
 Finland
France
Germany
 Greece
Iceland
Italy
 Ireland
Luxemburg
Netherlands
 Norway
Portugal
Spain
 Sweden
Switzerland
United Kingdom
Most of the European standards will be based upon international standards from CISPR and IEC. The numbering system used in the European standards is:

EN xx yyy

EN = European Norm.
xx = 50 denotes that the standard is a standard of CENELEC origin.
xx = 55 means the standard is based on a CISPR standard yyy.
xx = 60 means the standard is based on an IEC standard yyy.

Once the European standard is complete the individual members of the European Union will produce national harmonished standards and will usually give their harmonished standard a national number, Example:
the British harmonished standard of EN 55011 is BS EN 55011.
 

Disclaimer: Coil Winding Specialist, Inc., its affiliates, agents, and employees acting on behalf of Coil Winding Specialist, Inc. (collectively, CWS) disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. CWS reserves the right at any time and from time to time to make changes to design, technical specification, or construction of any product listed on this website without notice. CWS also reserves the right to discontinue or limit sale of any product or service available throughout this website on temporary or permanently basis without notice. CWS highly recommends customers not to use its products offered on this website for inappropriate use and applications. Products should be tested for its suitability by prospective customers in all possible applications and conditions. Customers using or selling CWS products for use in other than recommended applications do so entirely at their own risk and agree to fully indemnify CWS from any damages arising or resulting from such use or sale.

WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go towww.P65Warnings.ca.gov.

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Copyright 2008, Coil Winding Specialist, Inc
Updated July, 2013
CAGE Code: 5DME2(Registered with www.ccr.gov)