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What is CISPR 11?

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What is CISPR 11?

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Editorial Team - EMC Directory

Jul 11, 2022

CISPR 11 is an EMC standard for industrial, scientific, and medical (ISM) electrical equipment operating in the frequency range up to 400 GHz. This standard applies to a variety of equipment such as Wi-Fi systems, microwaves, x-ray machines, MRI scanners, and arc welders, along with domestic equipment falling into the industrial, scientific, and medical categories that can use the ISM license-free bands like 2.4 GHz. It covers radiated and conducted emission requirements related to radio-frequency disturbances in the frequency range of 9 kHz to 400 GHz. It also covers UV radiating and conducting equipment operating at frequencies within the ISM frequency bands defined by the ITU Radio Regulations. 

CISPR 11 is classified into two groups and two classes:

  • Group 1: This group covers ISM equipment that generates RF energy necessary for its internal functioning. For example, laboratory equipment, semiconductor converters, medical electrical equipment, industrial measurement, and control equipment, etc. 
  • Group 2: This group covers ISM equipment that intentionally generates and/or uses RF energy in the form of electromagnetic radiation, such as wi-fi systems, medical scanners, microwave ovens, mobile phones, and wireless chargers for mobile phones, microwave lighting apparatus, etc.
  • Class A: This category covers all ISM equipment that could be used in industrial and public areas but not residential areas. Class A devices can exceed Class B emission limits. 
  • Class B: This category covers ISM devices that are stable for domestic usage only. 

Group 1Group 2
Class A

RF energy may/may not be used for the internal functioning 

Industrial environment


Intentional RF emitters

Industrial environment


Class B

RF energy may/may not be used for the internal functioning

Domestic environment



Intentional RF emitters

Domestic environment



The first edition of CISPR 11 was released in 1975. Over the years, the standard has been revised with several editions. The list of CISPR 11 editions is given in the following table:

Year of ReleasePublicationEditionDescription
January 1975CISPR 11:19751.0This was the premiere edition of CISPR 11. The frequency range covered by this first edition of the standard was from 150 kHz to 18 GHz.
October 1990CISPR 11:19902.0

This edition categorized ISM devices into Group 1, Group 2, Class A, and Class B. Several amendments were also added to this edition to some conducted emission limits, especially for Class A equipment.

December 1997CISPR 11: 19973.0

This edition added several clauses to the existing clauses of the 2nd edition. Another category was added for Class A-Group 2 equipment which has supply current of more than 100 amps per phase.

March 2003CISPR 11: 20034.0This edition came with a few changes in clauses. It was also made mandatory for the receivers used for the measurements to meet the criteria of CISPR 16-1.
May 2009CISPR 11: 20095.0

This edition was released to provide more organized and transparent structure. It also introduced another set of limits for conducted and radiated disturbances of “heavy duty” general purpose equipment of class A group 1 with a rated input power of more than 20 kVA.

June 2015CISPR 11:2015 RLV6.0

This is a valid edition. It covers emission requirements related to radio-frequency disturbances in the frequency range of 9 kHz to 18 GHz. This edition also introduced and permitted type testing on components of power electronic equipment, systems and installations. 

The sixth edition has also been added with a couple of more amendments to incorporate the latest developments. The amendments included several limits that were adapted to the practical test conditions found at the test sites which also included the latest wireless power transfer devices. The seventh edition is in the SPLIT stage. This edition will also feature many changes that will show the growth of technology which started from a simple document to a complex document involving several types of products!

Click here for CISPR 11 test labs.

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