New IEC 62368-3 Requirement for AI Server Thermal Interface Materials

On May 6, ChromaTech Industrial disclosed that its high-frequency thermal conductive gel—designed for industrial robot controllers—has passed the newly introduced thermal runaway protection module under IEC 62368-3. Effective from Q2 2026, this updated standard will become a mandatory basis for CE marking in the EU, UL certification in North America, and SGS acceptance in Southeast Asia. Exporters of thermal interface materials (TIMs) from China must comply to supply into high-value overseas markets including AI server cooling systems, eVTOL power electronics, and edge computing units for smart grids.

Event Overview

ChromaTech Industrial announced on May 6 that its high-frequency thermal conductive gel for industrial robot controllers has achieved certification against the thermal runaway protection module added to IEC 62368-3. The standard’s updated requirements—including this new functional safety module—will be enforced starting Q2 2026 for CE (EU), UL (North America), and SGS (Southeast Asia) conformity assessments. No further details regarding test scope, certifying bodies, or transitional provisions were disclosed in the announcement.

Industries Affected

Direct Exporters of Thermal Interface Materials (TIMs)
These companies face direct market access restrictions: non-compliant TIM products will be excluded from AI server, eVTOL electronic control, and smart grid edge computing supply chains in the EU, North America, and Southeast Asia. Impact manifests as lost tender eligibility, delayed customs clearance, and contract renegotiation risk post-2026 Q2.

Raw Material Suppliers to TIM Manufacturers
Suppliers of silicone base polymers, ceramic fillers, or phase-change additives may experience revised technical specifications from TIM clients seeking IEC 62368-3–compliant formulations. Impact includes increased demand for traceable, thermally stable, and electrically insulated raw materials—potentially triggering requalification cycles and tighter documentation requirements.

Contract Manufacturers & TIM Formulators
Firms engaged in TIM compounding, dispensing, or curing processes must verify whether existing production lines meet the thermal runaway simulation and failure mode analysis stipulated in the IEC 62368-3 amendment. Impact involves potential equipment recalibration, process validation updates, and extended time-to-certification for new product variants.

Distribution & Certification Support Providers
Third-party testing labs, certification consultants, and logistics firms supporting TIM exporters may see rising demand for IEC 62368-3–specific functional safety assessments—including thermal stress cycling, fault injection, and end-of-life thermal behavior evaluation. Impact centers on service portfolio adaptation and capacity planning for upcoming certification surges.

Key Focus Areas and Practical Responses

Monitor official implementation timelines and scope clarifications

While enforcement begins Q2 2026, national accreditation bodies (e.g., UKAS, ANAB, SANAS) and regional conformity assessment authorities have not yet published detailed guidance on transition periods, grandfathering clauses, or test method harmonization. Companies should track updates from CENELEC, ANSI/UL Standards Group, and ASEAN Technical Advisory Group on Electrotechnical Standards.

Prioritize certification for high-margin, high-volume TIM applications

Not all TIM categories carry equal risk. High-frequency, high-power-density applications—such as those used in GPU-accelerated AI servers or eVTOL motor inverters—are most likely subject to strict scrutiny. Firms should map their export SKUs against known use cases in target markets and prioritize certification for those with documented thermal runaway exposure profiles.

Distinguish between regulatory signal and operational readiness

The May 6 announcement reflects one manufacturer’s successful certification—not a finalized regulatory mandate. Analysis shows this is currently a leading-indicator event: it confirms technical feasibility and early adoption, but does not equate to universal compliance deadlines or harmonized test protocols across jurisdictions. Companies should avoid premature full-scale retooling before official enforcement rules are published.

Initiate internal cross-functional alignment now

Preparing for IEC 62368-3 requires coordination among R&D (formulation design), QA (test method validation), procurement (raw material traceability), and regulatory affairs (certification pathway mapping). Current more appropriate action is to convene internal working groups, audit existing thermal safety documentation, and identify gaps in failure mode analysis capability—rather than launching external certification campaigns prematurely.

Editorial Perspective / Industry Observation

Observably, this development signals a structural shift in how functional safety is being extended beyond traditional power electronics into passive thermal management components. IEC 62368-3 was originally developed for audio/video and ICT equipment; its expansion to cover thermal runaway in TIMs suggests regulators now treat thermal interface performance as an integral part of system-level safety architecture—not just a reliability parameter. Analysis shows this is less a near-term compliance deadline and more a medium-term inflection point: it reflects growing convergence between thermal design, electrical safety, and AI hardware scalability. The industry should treat this as an evolving regulatory signal—not yet a closed standard—and expect further refinements as global certification bodies align on test reproducibility and pass/fail criteria.

From an industry perspective, this requirement underscores how upstream material specifications are becoming tightly coupled with downstream system safety certifications—a trend accelerating across AI infrastructure, advanced mobility, and distributed energy sectors.

In summary, the IEC 62368-3 thermal runaway module for TIMs represents an emerging gatekeeper for high-value export markets—not an immediate ban, but a defined technical threshold entering formal enforcement in mid-2026. It is better understood as a forward-looking benchmark for thermal safety integration, rather than a static compliance checklist. Companies are advised to treat it as a strategic signal requiring phased technical preparation, not an urgent tactical fix.

Source: ChromaTech Industrial public disclosure dated May 6.
Note: Implementation details—including test method standards, transitional arrangements, and jurisdiction-specific enforcement interpretations—remain pending official publication by relevant standards and conformity assessment bodies. These aspects require continued observation.