Japan Enforces DPT Certification for SiC Power Modules

On June 20, 2026, Japan’s JIS C 0920:2026 became mandatory, making double pulse testing (DPT) certification a market-access requirement for SiC power modules sold domestically or imported into Japan. The rule matters not only to module manufacturers, but also to exporters, procurement teams, and downstream buyers in new energy vehicles, smart grid systems, and industrial inverter supply chains, because compliance now directly affects whether products can enter mainstream Japanese procurement channels.

What the new JIS requirement now mandates

According to the provided information, JIS C 0920:2026 took compulsory effect on June 20, 2026. It requires all SiC power modules sold in Japan, including both automotive-grade and industrial-grade products, to pass DPT certification.

The requirement applies to products across the 650V to 3.3kV voltage range. Companies must also submit a complete waveform report issued by a third-party laboratory.

The same information states that Chinese SiC module exporters that have not completed DPT certification will be unable to enter mainstream supply chains in Japan’s new energy vehicle, smart grid, and industrial inverter markets.

Where the immediate pressure will be felt

Export-oriented module suppliers face an access threshold

From an industry perspective, the most direct impact falls on SiC module suppliers targeting Japan. The change is not limited to product performance claims; it is tied to whether a module can be offered into the market at all. The key business impact is therefore concentrated in qualification, documentation, and customer entry processes.

Procurement and sourcing teams must verify compliance status earlier

For buyers and sourcing teams in automotive, grid-related, and industrial power electronics applications, the new rule raises the importance of front-end supplier screening. What deserves closer attention is whether a supplier can provide DPT certification and a complete third-party waveform report, because this now affects sourcing continuity and approved vendor decisions.

Third-party testing and compliance support become part of delivery readiness

For service providers involved in testing, certification, and supply-chain support, the rule shifts DPT documentation closer to a core delivery requirement. Analysis shows that compliance is no longer only a technical checkpoint; it also becomes part of the evidence package needed for market entry and customer acceptance.

What companies should watch now

Check which product lines fall within the covered voltage range

Companies should first identify whether their SiC power modules fall within the 650V–3.3kV scope described in the provided information. This is especially relevant for suppliers serving both automotive and industrial customers, since the rule covers both categories.

Review whether existing test records match the required submission form

The current issue is not only whether DPT has been performed, but whether the company holds the complete waveform report from a third-party laboratory. Businesses should distinguish between internal validation data and the documentation actually required for Japanese market access.

Reassess shipment timing and customer communication

For exporters and channel partners, observably, compliance status may now influence delivery scheduling and customer onboarding. Where certification is incomplete, companies should prepare for possible interruptions in quotation, approval, or supply-chain entry discussions.

Track any further clarification in implementation language

Analysis shows that standard enforcement and practical execution are not always identical in day-to-day business. Companies should therefore continue monitoring any later clarification around documentation, scope interpretation, and acceptance practices, while avoiding assumptions beyond the confirmed requirement already in force.

Why this looks like more than a short-term procedural change

This section is an editorial observation based only on the provided information. It is more appropriate to understand this development as an active compliance threshold rather than a symbolic policy signal, because the rule is already mandatory and directly linked to supply-chain access in Japan.

At the same time, it should not be overstated as a complete market reset. Observably, the clearer implication is that technical verification and third-party documentation now carry greater commercial weight for SiC module suppliers serving Japan, especially where procurement is tied to regulated or high-reliability applications.

How the market should read this development

Based on the confirmed facts, this update is best understood as a concrete market-entry requirement with immediate relevance for SiC module trade into Japan. Its significance lies less in headline impact and more in the way it links testing, documentation, and commercial eligibility.

From an industry perspective, the prudent conclusion is that companies should treat this as a compliance-driven change already affecting business execution, while continuing to watch for any further clarification in how the requirement is applied in practice.

Basis of this article

This article is generated from the user-provided news title, event date, and event summary. The information available for this article includes the implementation of JIS C 0920:2026 on June 20, 2026, the mandatory DPT certification requirement for SiC power modules sold in Japan, the requirement for a complete third-party waveform report, the covered 650V–3.3kV range, and the stated impact on Chinese exporters seeking entry into Japanese mainstream supply chains.

For this type of industry update, commonly relevant source categories may include official notices, company statements, industry association releases, standard organization documents, and reports from authoritative media. A specific official source link was not provided in the input, so further verification remains necessary. Follow-up attention should focus on any later implementation clarification, document requirements, and market-side acceptance practices related to the rule.