ROHM’s 4th-Gen 650V IGBTs Target EV Auxiliary Systems
ROHM Semiconductor introduced fourth-generation 650V insulated-gate bipolar transistors (IGBTs) in late August 2026. These devices focus on automotive electric compressors and high-voltage (HV) heaters. They also serve inverters in industrial equipment.
The new IGBTs deliver class-leading low conduction loss at VCE(sat) = 1.55V. They maintain high short-circuit tolerance despite lower loss. The parts comply with the AEC-Q101 automotive reliability standard.
Technical Advancements in Device Structure
ROHM redesigned the device structure to achieve these gains. Engineers revised the process and edge termination layout. This approach boosts current density while cutting conduction and switching losses.
The devices ensure a 7µs short-circuit withstand time at Tj = 25°C. This performance addresses the classic trade-off between loss reduction and robustness. Higher efficiency and improved reliability result from these changes.
Product Lineup and Packaging Options
The initial portfolio spans multiple package types and configurations. Twelve products come in the TO-247N package. These belong to the RGAxxTS65HR and RGAxxTS65EHR series.
Ten bare wafer products form the SG83xxWN series. ROHM also develops twelve more devices in TO-247-4L packaging. These carry the RGAxxTR65HR and RGAxxTR65EHR designations.
Availability and Design Support Resources
TO-247N package products and selected bare wafers are already available. Online distributors such as DigiKey and Farnell stock TO-247N items. ROHM provides SPICE and PLECS models for circuit simulation.
Engineers can download these resources from ROHM’s official website. The Field Stop Trench IGBT product page hosts these files. This support speeds up design cycles and validation work.
EcoIGBT™ Brand and Manufacturing Strength
These IGBTs fall under ROHM’s EcoIGBT™ brand. The brand covers both discrete devices and modules for high-voltage uses. ROHM develops key technologies in-house from wafer to packaging.
The company operates an integrated production system. This setup strengthens its position as a leading power-device supplier. EcoIGBT™ is a registered trademark of ROHM Co., Ltd.
Application Examples in Automotive and Industry
The IGBTs suit several critical automotive auxiliary systems. Electric compressors for cabin climate control benefit from lower loss. HV heaters, including PTC and coolant heaters, gain efficiency too.
Industrial equipment inverters form another major use case. Motors and compressors in factories drive ongoing silicon IGBT demand. Energy savings and smaller designs remain key market drivers.
Future Roadmap and Package Expansion
ROHM plans to broaden the lineup in existing packages soon. Compact surface-mount IGBTs using TO-263L packaging are in development. Top-side cooling (TSC) packages will join the portfolio later.
This expansion targets space-constrained designs and thermal performance. The move aligns with trends toward miniaturization in power electronics. More efficient drives and smaller systems will follow from these efforts.
List of Key Features and Benefits
- VCE(sat) = 1.55V enables class-leading low conduction loss.
- 7µs short-circuit withstand time at 25°C ensures robust operation.
- AEC-Q101 qualification meets stringent automotive reliability needs.
- Redesigned device structure raises current density and cuts losses.
- TO-247N, TO-247-4L, and bare wafer options cover diverse designs.
- SPICE and PLECS models accelerate simulation and validation tasks.
- Future TO-263L and TSC packages support compact, cooled assemblies.
Sources: ROHM
