Two frequent questions from KC applicants: What is the validity period of KC certificates? What documents need to be submitted?

Answers vary based on the three KC certification schemes: Safety Certification, Safety Confirmation and Supplier Self-Declaration. Each scheme has independent rules for document requirements and validity.

1. Complete Document List for KC Certification

Documents to be submitted to laboratories before testing:

·Product Specification: Including functions, operating voltage, clock frequency and interface details for laboratories to determine applicable standards and test plans.

·Circuit Schematic: Complete design drawings covering power modules, control circuits and interface circuits.

·PCB Layout Drawing: Marking component positions and wiring routes.

·Bill of Materials (BOM): Model and specifications of all key components.

·Korean User Manual: Operating instructions, safety warnings and installation guides. Only Korean is accepted; English and other languages are not recognized by Korean authorities.

·Label & Nameplate Draft: The product body must be printed with the KC mark, certification number, operating voltage, frequency, manufacturer and Korean authorized representative information. Nameplates are mainly in Korean, with technical parameters allowed to use English; pure Chinese nameplates are rejected. Some home appliances require a Korean after-sales service phone number.

·Test Samples: Prepare 2 ~ 3 standard samples. Prepare more than 3 samples for wireless and networked smart products, together with complete accessories and original cables.

For products with Bluetooth, Wi-Fi and other wireless functions, additionally submit RF module specifications, module compliance documents, frequency band and transmit power parameter sheets. For combined application of series models, provide documents explaining differences between series products.

After tests are passed, archive all test reports, technical documents and official certificates as compliance records.

Supplementary Technical Documents

·Compliance Certificates of Key Components: Power supplies, lithium batteries and other critical parts must hold valid compliance documents. Besides KC certificates, CB, UL and other internationally recognized certificates on the official approved list are also acceptable. Prioritize components listed on KATS and RRA approved catalogs.

·Documents for Networked Products: Networked smart products with external network access and remote control functions need to submit cybersecurity test reports and legally signed cybersecurity declarations since 2026. Exempted for devices with only local wireless communication.

·Korean Authorized Representative Agreement: Non-Korean manufacturers must appoint a local authorized representative, and the official signed agency agreement is a mandatory application document. Simple cooperation descriptions are not accepted.

  2. Validity Rules of KC Certificates

Three certification schemes have different validity regulations:

·Safety Certification (High-risk products): Applied to large home appliances and high-capacity lithium batteries. Mandatory factory inspection and annual surveillance audits. No fixed expiry date; certificates are maintained via annual audits and will be revoked if audits fail.

·Safety Confirmation (Medium & low-risk products): No factory inspection required. Certificates are valid for 5 years and need renewal before expiration. Technical documents will be re-reviewed during renewal, and partial re-tests based on the latest standards are required if standards are updated.

·Supplier Self-Declaration (Lowest-risk products): No official certificates issued. Enterprises issue self-declarations and archive test reports, which remain valid permanently.

Rules for Product Modification

KC certification is not a one-time process. Product revisions or standard updates require re-evaluation of existing certificates:

·Safety Certification Scheme: Replacing key components, revising circuits or changing structures are major modifications requiring re-tests and document updates. Inspectors will verify product consistency during annual audits, and unauthorized changes will lead to certificate revocation.

·Safety Confirmation Scheme: Evaluate the impact of all modifications. Any change affecting safety or EMC performance requires re-tests and document updates.

·Supplier Self-Declaration Scheme: Follow the same evaluation logic; enterprises update internal archives without official application procedures.

If brands are changed while product specifications, parameters, structures and components remain on the official approved list, only internal records need to be kept. Replacing power modules, adjusting PCB layouts or changing electrical parameters of components must trigger re-tests and document updates.

Impact of Standard Updates

Korea’s safety and EMC standards are revised regularly. KATS announces standard updates and transition periods. Old and new standards are both valid during transitions; old standards are completely abolished after the period ends.

KC certification requires more documents than FCC SDoC, including Korean manuals, Korean representative agreements and cybersecurity materials. The three certification schemes have differentiated validity rules that cannot be generalized.

For South Korea KC Certification services, please contact Blueasia: 13534225140