Complete Document Checklist for Korea KC Certification｜RRA EMC‑RF and KATS Safety‑Compliance Rules

KC certification is compulsory for products sold in South‑Korea split into two independent systems: KATS for electrical‑safety approval and RRA for EMC & radio‑frequency voluntary confirmation with separate KC registration numbers issued respectively. 

Most Chinese manufacturers fail KC audits not due to hardware‑test failures but incomplete files, non‑standard Korean‑language documents or incorrectly‑selected KN‑series test standards. This guide lists full document checklists, Korean‑document specifications, report‑writing requirements and common rejection‑causes.

1. Full Required Document Checklist

Documents are divided into applicant‑side materials, technical files and test reports. Add brand‑authorization letters for OEM‑ODM products.

-Applicant‑related documents

a.Scanned copy of Chinese manufacturer’s business license.

b.Full information of local Korean importer including Korean‑company business licenses and responsible‑person data. Korean law prohibits overseas manufacturers from applying for KC registration independently; local Korean importers act as in‑country responsible parties.

c.Authorization letter issued by manufacturers to Korean importers or local agents. ODM‑branded goods additionally require Korean‑version authorization documents from brand owners.One practical tip: You can appoint the same Korean importer for both KATS safety and RRA RF‑EMC projects but submit separate applications.

-Product‑technical documents (schematics and BOM can be written in English)Circuit schematics, system block diagrams, full BOM lists, antenna datasheets (mandatory for wireless products), nameplate drawings and product external photos. User manuals and warning labels require Korean‑language safety‑warning content while main‑body descriptions can be written in Chinese plus English. Schematics, BOM and PCB layout drawings only need English versions without Korean translation.

-Test‑report requirementsReports can only be issued by two types of labs: local Korean KOLAS‑approved facilities or overseas KOLAS‑accredited labs registered on official RRA and KATS platforms. KOLAS‑qualified labs without official Korean‑side registration produce invalid reports. Report‑main‑content can remain in English. Translating cover pages and conclusion sections into Korean shortens review time though it is not legally required. All test reports must reference Korean KN‑standards rather than international CISPR or IEC standards alone.

  2. Strict Rules for Korean‑Language Documents (Core Audit Focus for RRA and KATS)

·Compulsory Korean‑text content (machine‑translation is not allowed): Safety‑warning sentences inside user manuals and warning words printed on nameplates have to use native Korean text with Chinese and English as supplementary content. RRA examiners review every Korean word word‑by‑word. Hire local Korean translators or compliance agencies to avoid grammar and terminology mistakes.

·Font‑size requirement: The minimum character height for Korean warning‑text must reach 3mm. Many Chinese suppliers reuse English‑label font sizes leading to direct application rejection.

·Documents exempted from Korean translation: Schematics, BOM lists, block diagrams, PCB layouts and full‑text test‑reports can stay in English.

·KC‑logo specifications: KC marks must be printed with a minimum height of 5mm following official proportional designs without stretched deformation. KC‑numbers can be arranged neatly without fixed‑size limitations compared with product‑name fonts.

  3. KC Test‑Report Compilation Standards

·Mandatory report contents

① Lab’s KOLAS registration number and RRA / KATS overseas‑registration ID shown on report cover pages.

② Apply corresponding KN standards: KN‑32 for regular EMC testing. Factory‑installed car‑T‑Box units additionally run KN‑61000‑4‑2 and KN‑61000‑4‑3 vehicle‑anti‑interference tests while aftermarket head‑units still follow KN‑32.

③ Test results cannot simply show PASS or FAIL; each item must include measured values, limit thresholds and margin data. RF‑test reports need frequency‑band lists, maximum transmit power, occupied bandwidth and per‑channel spurious‑emission data.

EMC‑test items include conducted emissions from 150kHz‑30MHz and radiated emissions between 30MHz‑6GHz. Factory‑installed automotive‑products add ESD, EFT, surge and RF‑field immunity tests under KN‑61000 series.

  4. Application‑Form Completion and Series‑Approval Rules

Download KATS safety‑application forms from KATS official websites and RRA‑EMC forms from RRA platforms with separate filling‑procedures. Select correct official Korean product‑classification codes; wrong codes result in application rejection. Information of Korean importers must exactly match contents on their business‑licenses.

Rules for series‑model approval: Products sharing identical hardware can reuse one test‑report only if you merely change housings, screens and colors. Replacing Wi‑Fi/Bluetooth modules, antennas or RF‑components requires separate testing with clear notes of component‑differences between various models inside application‑forms.

  5. Post‑Certification Compliance Reminders

RRA voluntary confirmation and KATS safety‑KC certificates are permanently valid. Korean authorities conduct annual market‑surveillance inspections and cancel KC numbers if mass‑produced products deviate from tested samples with sales banned in Korea. 

Hardware‑change classification: Only housing‑appearance and UI‑software‑updates need document‑change filings; replacing RF‑chips, antennas or PCB RF‑circuits triggers full‑set re‑testing.

For KC standard‑selection and RRA filing services, get in touch with BlueAsia compliance specialist Benson via +86 13534225140.