Thailand's TISI Mandatory Certification is a crucial market access requirement. To help you prepare clearly and efficiently, below is a detailed breakdown of the latest requirements regarding certification documents, validity period management, and practical application advice.
The Thailand Industrial Standards Institute (TISI) implements mandatory certification for products under the Industrial Product Standards Act. Understanding the following core concepts is fundamental to preparing documents and managing certificates:
1.Certification Nature: TISI certification is divided into Mandatory Certification and Voluntary Certification. You must first confirm if your product is listed under the mandatory scope. Common mandatory products include electric fans, washing machines, refrigerators, air conditioners, plugs, and sockets.
2.Marking Requirement: Products under mandatory certification must bear the TISI mark, indicating the corresponding TIS standard number and certification number, to be legally sold in the Thai market.
3.Localization Requirement: This is a key point. Foreign manufacturers must appoint a company registered in Thailand as the legal representative (certificate holder) to submit the application. Additionally, product manuals and labels must contain Thai language information.
II. Detailed List of Required Documents for TISI Certification:
Preparing complete and compliant documents is the first step to successful TISI certification. Below is the detailed checklist:

Important Notes:
·Testing Requirements: Products must be tested in a TISI-recognized laboratory. Typically, 2-3 sets of complete products are needed as samples, and the testing cycle generally takes 4-6 weeks.
·Language Requirements: The product user manual must be provided in English or Thai. The TISI mark on the product nameplate must have a height not less than 5mm and clearly show the certification number, voltage specifications, and country of origin (e.g., "Made in China").
III. TISI Certificate Validity & Post-Certification Maintenance:
Obtaining the TISI certificate is not the end; effective ongoing management is crucial.
1.Certificate Validity: The TISI Certificate of Conformity is typically valid for 3 years. It can be renewed upon expiry.
2.Annual Surveillance Audit: During the 3-year validity period, the certificate holder must undergo annual surveillance audits, which may include unannounced factory inspections and market sampling. Failure to pass the surveillance audit may lead to certificate suspension.
3.Design Change Management: If the product undergoes hardware changes (e.g., replacing critical circuits, antennas) or software adjustments (e.g., changing power, frequency bands), it must be declared to TISI and may require re-testing or re-certification, costing approximately 30%-70% of the initial certification.
IV. Practical Advice & Latest Developments:
To help you complete the certification process more smoothly, please note the following:
1.Early Planning & Optimization Strategies:
·Start Early: The complete TISI certification cycle typically takes 8-12 weeks, involving multiple stages like document review, product testing, and factory inspection. Plan well in advance.
·Utilize Existing Reports: If you already hold internationally recognized CB Test Reports, submit them as reference during application to simplify the process, but remember that Thai national difference tests are still required.
·Leverage System Certificates: Factories holding ISO 9001 Quality Management System certification can significantly streamline the factory audit process.
2.Key Compliance Points:
Local Agent: Ensure your Thai authorized representative is qualified; this is a mandatory prerequisite for application.
Non-Compliance Risks: Selling products subject to mandatory TISI certification without certification may result in maximum penalties of
·200,000 THB (approx. ¥40,000 RMB) fine or 2 years imprisonment. Improper use of the TISI mark can also lead to daily fines until corrected.
3.Monitor Standard Update Dynamics:
TISI updates its technical standards periodically. For example, according to 2025 information, the following product standards have been updated or will take effect:
·Mandatory certification for hot/cold water dispensers and distribution boards took effect on October 1, 2025.
·The new standard for microwave ovens (including combination types) becomes mandatory on December 30, 2025.
·The new energy efficiency standard for room air conditioners becomes mandatory on April 4, 2026.
·New standards for products like electric irons, washing machines, and instantaneous water heaters have also been published, with specific effective dates pending. Be sure to verify the latest version of the standard applicable to your product before applying.
The key to successfully passing Thailand TISI certification lies in: confirming the product category and applicable standards early, preparing complete technical documents that meet language requirements, ensuring you have a qualified Thai local representative, and actively managing annual surveillance and changes after certification.
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