Renesas Electronics has officially entered the low-voltage Gallium Nitride (GaN) power semiconductor market with the introduction of its inaugural line of 100V enhanced-mode (E-mode) GaN discrete power transistors. This significant move marks a new phase for the company, expanding its GaN technology portfolio into applications demanding higher efficiency and faster switching speeds at lower voltages.
Targeting High-Growth Sectors
The new series, featuring part numbers such as RTP100E005G1FL, RTP100E2P6G1FL, RTP100E1P8G1FL-DSC, and RTP100E1P12G1FL-DSC, is specifically engineered for demanding applications like AI data centers, humanoid robots, factory automation, and industrial motor drives. These sectors are rapidly growing and require power solutions that can deliver superior performance while minimizing energy loss.
Performance Advantages of GaN
Renesas highlights the exceptional performance of these new GaN transistors, particularly their hard-switching and soft-switching Figure of Merit (FOM). The company reports that hard-switching FOM is improved by up to 35%, and soft-switching FOM by up to 63% compared to competing GaN devices. This translates to significant efficiency gains, estimated between 1% and 3% over traditional silicon-based designs. Furthermore, the GaN devices eliminate reverse recovery charge (Qrr) losses, leading to a substantial reduction in switching losses ranging from 40% to 70%.
The architectural advantage of GaN lies in its wide bandgap material, which offers a critical breakdown electric field approximately ten times higher than silicon. This allows for the formation of a two-dimensional electron gas (2DEG) at the AlGaN/GaN heterojunction interface, enabling low-resistance conduction without doping. The result is faster switching speeds, reduced gate charge, and lower output capacitance. Crucially, GaN devices lack a body diode, meaning reverse conduction relies on channel turn-on, which effectively results in near-zero Qrr.
Seamless Integration and Design Flexibility
A key aspect of Renesas’s new GaN transistors is their compatibility with existing silicon device packaging. This feature is designed to simplify adoption for manufacturers, allowing them to transition from silicon MOSFET designs to GaN solutions with minimal PCB redesign effort. The transistors are offered in various standard MOSFET-compatible packages, facilitating a quicker time-to-market for new products leveraging GaN technology.
Renesas’s Evolving GaN Strategy
This launch represents a strategic expansion for Renesas in the GaN power semiconductor space. The company acquired Transphorm, a prominent GaN power semiconductor manufacturer, in June 2024. This acquisition provided Renesas with access to Transphorm’s SuperGaN technology and a portfolio of reference designs. While Renesas previously focused on higher voltage GaN products, such as the 650V Gen IV Plus GaN FETs announced in July 2025 for high-power applications, this 100V E-mode discrete device marks its first foray into the low-voltage GaN domain.
The Figure of Merit (FOM) is a critical metric for evaluating power devices, often calculated as the product of on-resistance and gate charge (RDS(on)×Qg). A lower FOM indicates the potential for higher switching frequencies at the same loss levels, or lower losses at the same frequency. Traditional silicon MOSFETs typically have an FOM around 1000mΩ·nC, whereas GaN devices commonly achieve figures between 50 to 100mΩ·nC, demonstrating their superior performance characteristics.
With the introduction of these low-voltage GaN transistors, Renesas is well-positioned to address the growing demand for high-efficiency, high-performance power solutions across a range of emerging and established technology sectors.
