onsemi Launches New Cooling Packaging Technology to Drive Efficiency in Power-Hungry Applications

Top-cool package delivers superior thermal performance, reliability, and design flexibility for EVs, solar infrastructure, and energy storage systems

What's New: onsemi today announced the release of its EliteSiC MOSFETs in the industry-standard T2PAK top-cool package, advancing power packaging for automotive and industrial applications. This new offering delivers enhanced thermal performance, reliability and design flexibility for demanding high-power, high-voltage applications for markets including electric vehicles, solar infrastructure, and energy storage systems.

onsemi's latest portfolio of 650V and 950V EliteSiC MOSFETs in T2PAK packaging combines the company's industry-leading silicon carbide technology with one of the most innovative top-cool packaging formats. Initial devices are shipping to lead customers, with additional products planned for Q4 2025 and beyond. By introducing the T2PAK across its EliteSiC family, onsemi is offering a powerful new option for automotive and industrial customers seeking efficiency, compactness, and durability in demanding high-voltage applications.

Why it Matters: With rising power requirements in applications such as solar inverters, EV chargers, and industrial power supplies, effective thermal management has become a critical engineering challenge. Conventional packaging often forces designers to choose between thermal efficiency and switching performance. The EliteSiC T2PAK solution addresses this issue by efficiently transferring heat from the printed circuit board (PCB) directly into the system's cooling infrastructure, enabling superior performance without compromise. This results in:

• Superior thermal efficiency and reduced operating temperatures
• Lower component stress, extending system lifetime
• Higher power density and compact system design
• Simplified system design to achieve faster time to market

"Thermal management is one of the most critical challenges facing power systems designers in automotive and industrial markets today. Power system designers in automotive and industrial markets are seeking solutions that deliver efficiency and reliability without compromise. With our EliteSiC technology and the innovative T2PAK top-cool package, customers can unlock superior thermal performance and design flexibility, empowering them to create next-generation products that stand out in today's competitive landscape." - Auggie Djekic, Vice President and Head of SiC Division at onsemi.

How It Works: The T2PAK's top-cool package delivers an optimal balance of heat dissipation and switching performance by enabling direct thermal coupling between the MOSFET and the application heatsink. This design minimizes junction-to-heatsink thermal resistance and supports a wide range of Rds(on) options (12mΩ to 60mΩ), providing enhanced design flexibility. Key technical highlights include:

• Superior thermal performance by channeling heat directly into the system's heatsink, bypassing the PCB thermal limitations
• Maintains low stray inductance, enabling faster switching speeds and reduced energy losses
• Combines the benefits of both TO-247 and D2PAK without significant drawbacks

With EliteSiC's superior figure of merit in a T2PAK top-cool package, designers can achieve more compact, cooler, and higher-efficiency systems.

More Information:

• T2PAK Products
• EliteSiC Portfolio