Infineon Technologies CoolSiC™ JFET Transistors
Infineon Technologies CoolSiC™ JFET Transistors enable next-generation solid-state power distribution with upgraded protection and switching architectures for robust, efficient solid-state solutions. These transistors offer .XT interconnection technology, which ensures improved thermal performance and high robustness under pulsed and cyclic loads. The CoolSiC™ JFET-based solid-state designs enable higher switching speeds and allow rapid fault isolation, reduce system damage risk, minimize downtime, and contribute to longer system lifetime. Typical applications include AI data centers, solid-state protection, industrial power systems, and motor soft starters, and surge protection.
Why Solid-State Power Distribution
The Solid-State Circuit Breakers (SSCBs) lead the way through the transition to digitalized power distribution demands with a new generation of protection devices. Modern power systems are shifting from mechanical switching to solid-state architectures to achieve faster, smarter, and more controllable protection. The CoolSiC™ JFET technology combines the advantages of silicon carbide with innovative packaging and advanced chip design, delivering unmatched efficiency, robustness, and reliability.
Why CoolSiC™ JFET from Infineon
Infineon’s CoolSiC™ JFET technology is designed to meet the growing demand for high-performance, solid-state power distribution and protection in rapidly evolving environments. The CoolSiC™ JFET transistors cover the 750V and 1200V classes, enabling system designers to push efficiency and reliability to the next level. An extremely low on-resistance of 1.6mΩ helps minimize conduction losses, making them ideal for high-current applications and enabling drop-in replacement of existing SiC MOSFET designs without requiring PCB redesign. These transistors feature an advanced .XT interconnection technology ensures improved thermal performance and high robustness under pulsed and cyclic loads. This makes them highly reliable even under overload and fault conditions. The CoolSiC™ JFET-based solid-state designs enable higher switching speeds compared to electromechanical solutions. This enables rapid fault isolation, reduces the risk of system damage, minimizes downtime, and extends system lifetime for mission-critical applications.
Features
- High efficiency with minimized conduction and switching losses
- Robust operation in harsh electrical and thermal environments
- Fast, reliable solid-state protection
- Flexible integration with a broad package and configuration options
Applications
- AI data centers: Enable efficient and reliable power distribution in PSUs, PBUs, IBC stages, and hot-swap or eFuse designs—supporting high power density and uptime
- Solid-state protection: Ideal for SSCBs, electronic relays, and smart power distribution systems, replacing mechanical solutions with faster, more reliable switching
- Industrial power systems: Supports battery management, disconnect switches, and high-current distribution applications requiring both robust conduction and rapid fault isolation
- Motor Soft Starters and Surge Protection: High-voltage electronic relays, motor soft starters, and active surge protection devices
Solid-State Circuit Breaker
Overview: CoolSiC™ MOSFET vs. CoolSiC™ JFET technology
Overview: CoolSiC™ JFET – equivalent circuit diagram
