KN22 and KN24
KN22 and KN24 are the Korean technical requirements for electromagnetic emissions and immunity of information technology equipment, based on CISPR 22 and CISPR 24 respectively. This article explains their role in Korean KC certification and Compatible Electronics' accredited Korean EMC testing. Part of the Compatible Electronics Learning Center.
What are KN22 and KN24?
KN22 and KN24 are Korean National (KN) technical standards for electromagnetic compatibility of information technology equipment, administered by the National Radio Research Agency (RRA) of Korea. They are the Korean implementations of CISPR 22 (emissions) and CISPR 24 (immunity) respectively — adapted and published as Korean national standards for use in the KC (Korea Certification) marking process.
Products sold in the Korean market that fall within the scope of these standards must pass KN22 and KN24 conformity assessment procedures to obtain KC certification — the mandatory market access mark in South Korea for applicable electrical and electronic equipment. Compatible Electronics is accredited for the Korean conformity assessment procedures and provides Korean KC/KCC certification testing services.
KN22 — Emissions for IT Equipment
KN22 is based on CISPR 22 and specifies the radio disturbance characteristics (emissions limits and measurement methods) for information technology equipment in the Korean market. Like CISPR 22, it distinguishes between Class A (commercial/industrial) and Class B (residential) equipment, with corresponding limits for conducted emissions (150 kHz–30 MHz) and radiated emissions (30 MHz–1 GHz).
The transition from CISPR 22 to CISPR 32 at the international level is being reflected in Korea through the adoption of KN32 (based on CISPR 32 / EN 55032) for multimedia equipment. Products should be assessed against the current applicable Korean standard for their product category.
KN24 — Immunity for IT Equipment
KN24 is based on CISPR 24 and specifies the immunity characteristics for information technology equipment for the Korean market. It requires the same immunity tests as EN 55024 / CISPR 24, including ESD, radiated RF, EFT/burst, surge, conducted RF, and voltage dips. Performance criteria align with those in the international standard.
ⓘ KC Certification note: Korean KC certification requires testing and certification by a recognized Conformity Assessment Body (CAB). Compatible Electronics holds the accreditations needed to perform the KN22 and KN24 tests to Korean RRA conformity assessment procedures, and our test reports support KC certification applications through the appropriate Korean certification body.
The KCC (Korean Communications Commission) mark was merged into the KC (Korea Certification) mark as of January 24, 2011. All new products certified after that date must comply with the new marking and numbering scheme. The KC logo and certification number are required on both the product and the packaging.
| Standard / Procedure | Locations Accredited |
|---|
| KCC Notice 2008-39 (EMI — Korea Technical Requirements) | Lake Forest/Silverado, Brea, Newbury Park |
| KCC Notice 2008-38 (EMS — Korea Technical Requirements) | Brea, Newbury Park |
| RRA Public Notifications 2011-05/2011-18/2011-24 (EMI) | Lake Forest/Silverado, Brea, Newbury Park |
| RRA Public Notifications 2011-06/2011-17/2011-25 (EMS) | Lake Forest/Silverado, Brea, Newbury Park |
| KN 32:2015 / KN 32:2013 (Multimedia Emissions) | Lake Forest/Silverado, Brea |
| KN 35:2015 / KN 35 (Multimedia Immunity) | Lake Forest/Silverado, Brea |
Ready to Test Your Product?
Compatible Electronics is an NVLAP-accredited EMC testing laboratory (Lab Code 200527-0) with three Southern California locations.
www.celectronics.com
