ROHM Develops 5th Generation SiC MOSFETs

Why It Matters

The lower loss and higher temperature performance enable smaller, more powerful power modules, accelerating SiC adoption across EVs and high‑density data‑center workloads. This strengthens ROHM’s competitive position while helping the industry meet rising efficiency and sustainability targets.

Key Takeaways

• 5th‑gen SiC MOSFETs cut ON‑resistance 30% at 175°C
• Improved efficiency enables smaller, higher‑power traction inverters
• Samples of discrete devices and modules available from July 2026
• ROHM expands breakdown‑voltage and package options for 5th‑gen line
• SiC adoption accelerates in AI servers, data centers, and EVs

Pulse Analysis

Silicon‑carbide (SiC) power devices have become a cornerstone of the energy‑efficiency push in both automotive and data‑center markets. ROHM, a pioneer that began mass‑producing SiC MOSFETs in 2010, leverages a decade of process refinement to launch its fifth‑generation EcoSiC line. By reducing on‑resistance by roughly 30% at high junction temperatures, the new devices shrink thermal footprints and cut conduction losses, a critical advantage as electric‑vehicle (EV) manufacturers chase longer range and faster charging while data‑center operators grapple with soaring power densities driven by generative AI workloads.

The technical leap stems from structural enhancements and tighter manufacturing tolerances that preserve breakdown voltage while shrinking chip size. In EV traction inverters, the lower loss translates directly into higher drivetrain efficiency and reduced cooling requirements, allowing designers to package more power in a smaller envelope. For AI servers and industrial power supplies, the improved thermal performance supports higher power‑density modules, mitigating the risk of localized supply shortages that have plagued the sector as demand for high‑performance compute spikes.

Looking ahead, ROHM’s roadmap includes expanding voltage ratings and packaging formats, positioning the company to meet diverse system‑level requirements from 10 kW onboard chargers to multi‑hundred‑kilowatt industrial converters. As competitors race to close the performance gap, ROHM’s early‑stage sample availability and enhanced design‑tool ecosystem could lock in key OEM partnerships. The broader industry implication is a faster transition from silicon to SiC, driving down overall energy consumption and supporting global sustainability goals while delivering the power density needed for next‑generation AI and EV applications.