EU REACH: SiC Polymers Face 247-SVHC Checks

On June 1, 2026, the European Commission formally implemented the 78th amendment to REACH Annex XVII, introducing a compliance requirement that directly affects SiC power semiconductor modules entering the EU market because packaging-grade specialty polymers used in these modules must now be supported by full 247-item SVHC screening and a conformity declaration.

Confirmed Regulatory Change Now in Effect

The confirmed event concerns the implementation of the 78th amendment to Annex XVII of the REACH Regulation on June 1, 2026. The requirement applies to packaging-grade specialty polymers used in silicon carbide, or SiC, power semiconductor modules that enter the EU market.

The covered polymer materials include epoxy molding compounds, thermal interface materials, and underfill adhesives. For these materials, companies must provide a full screening report covering 247 substances of very high concern, or SVHCs. The report must be issued by a laboratory certified under OECD GLP requirements.

The requirement also calls for an accompanying conformity declaration. Products that do not meet the requirement may be refused customs clearance or removed from sale.

How the Rule May Reshape Industry Workflows

Exporters and EU-facing trading companies

Direct trading companies are affected because customs clearance and market access now depend on whether the relevant SiC power module polymer materials are supported by the required SVHC screening report and conformity declaration. The impact is likely to appear in shipment documentation, customs preparation, customer compliance review, and post-entry sales controls.

These companies may need to pay closer attention to whether test reports are complete, whether the issuing laboratory meets OECD GLP certification expectations, and whether the declared polymer scope matches the actual materials used in the modules being shipped.

Raw material procurement teams

Raw material buyers are affected because epoxy molding compounds, thermal interface materials, and underfill adhesives are named material categories under the requirement. Procurement work may therefore need to include verification of supplier-provided SVHC screening documents before materials are selected for SiC module production intended for the EU market.

Key business links include supplier qualification, material specification review, purchase order conditions, and incoming material documentation. Buyers may need to monitor whether existing suppliers can provide screening reports that cover all 247 SVHC items and whether the documentation can be linked to the exact material grade purchased.

Manufacturers and module assembly operations

Processing and manufacturing companies are affected because the requirement is tied to the materials used in SiC power semiconductor modules, not only to the finished module as a commercial product. Manufacturing operations may need to align material selection, process records, and technical documentation with the compliance package required for EU entry.

The practical impact may appear in bill-of-materials control, change management for encapsulation materials, technical file preparation, and release procedures before shipment. Manufacturers may also need to ensure that substitution of a polymer material does not create a documentation gap for the required SVHC screening and conformity declaration.

Supply chain service providers

Supply chain service companies, including logistics coordinators, compliance service providers, and documentation support partners, may be affected because non-compliant products can be blocked at customs or removed from sale. Their role may become more closely connected to document pre-checks and shipment readiness.

Relevant operational areas include export file review, customs document coordination, compliance document archiving, and communication between manufacturers, buyers, and import-facing parties. These companies may need to confirm that the required screening reports and declarations are available before shipment milestones are finalized.

Compliance Priorities for Companies Preparing Shipments

Match every polymer category to the required SVHC report

Companies should review whether all covered polymer categories used in SiC power modules are identified in their compliance files. The event specifically refers to epoxy molding compounds, thermal interface materials, and underfill adhesives. If any of these materials are used in modules entering the EU market, the related documentation should be checked against the 247-item SVHC screening requirement.

Verify the laboratory qualification before relying on a report

The screening report must be issued by a laboratory certified under OECD GLP requirements. Companies should therefore verify the laboratory qualification status and ensure that the report is suitable for the relevant material and product scope. A report that does not clearly correspond to the polymer material used may create clearance or sales risks.

Align conformity declarations with shipment documents

The requirement includes a conformity declaration in addition to the SVHC screening report. Businesses should make sure that declarations are consistent with product names, material descriptions, shipment records, and customer-facing technical documents. Inconsistencies may increase the risk of document challenges during clearance or downstream compliance review.

Build compliance checks into purchasing and delivery planning

Because products that do not meet the requirement may be refused customs clearance or removed from sale, compliance should be treated as part of procurement and delivery planning rather than a final administrative step. Companies may need to confirm document availability before placing orders, changing suppliers, scheduling production, or booking EU-bound shipments.

Industry Observation: A Higher Bar for Material Traceability

From an industry perspective, this change can be understood as a shift from general product compliance toward more detailed material-level verification for SiC power semiconductor modules. The requirement focuses on packaging-grade specialty polymers, which means that compliance attention may move deeper into the bill of materials and supplier documentation chain.

Analysis shows that companies with stronger material traceability, clearer supplier qualification procedures, and earlier testing coordination may be better positioned to respond to this type of regulatory requirement. This is an analytical observation rather than a confirmed market outcome, as the input does not provide data on costs, shipment volumes, or company-specific readiness.

What deserves closer attention is the possible effect on procurement specifications and technical documentation. If buyers require proof of 247-item SVHC screening before approving materials for EU-bound SiC modules, suppliers may face stronger expectations for test report completeness, declaration accuracy, and document update discipline.

Measured Outlook for the SiC Module Supply Chain

The implementation of the REACH Annex XVII amendment marks a significant compliance checkpoint for SiC power semiconductor modules entering the EU market. Its practical importance lies in linking market access to certified SVHC screening for key packaging-grade polymers and to the availability of a conformity declaration.

A reasonable conclusion is that affected companies should treat the requirement as a documentation, supplier management, and shipment-readiness issue. The final impact will depend on how companies align testing, procurement, manufacturing records, and customs preparation with the new compliance requirement.

Source Note and Items to Monitor

This article is based on the provided information title, event date, and event summary. Specific official source links were not provided in the input and should be verified continuously.

For this type of regulatory event, companies would normally monitor official regulatory publications, customs implementation guidance, recognized conformity assessment requirements, laboratory certification references, and market surveillance notices. Further attention should also be paid to detailed enforcement practice, certification interpretation, tender document changes, customer compliance requests, and industry feedback after implementation.