Magnachip Semiconductor Corporation has introduced two new 6th-generation 600 V Super Junction (SJ) MOSFETs designed to address the increasing efficiency, power density, and reliability requirements of AI server power supplies and other high-performance power conversion applications.
The new devices feature low on-resistance values of 36 mΩ and 37 mΩ, helping reduce conduction losses and improve overall power conversion efficiency. Both products also integrate a Zener diode between the gate and source terminals, providing enhanced protection against electrostatic discharge (ESD) events and improving long-term device reliability in demanding operating environments.
In addition to improved electrical performance, the new generation incorporates a significantly smaller die size compared with previous Magnachip SJ MOSFET generations, enabling higher integration density and greater design flexibility for power system developers.
One of the newly released devices, the MMTB60R037G6FZVRH, incorporates a Fast Recovery Body Diode (FRD) structure that reduces reverse recovery losses and enhances switching performance during high-frequency operation.
These characteristics are particularly important for AI server power supplies, where maximizing efficiency, reducing thermal dissipation, and increasing power density have become critical design priorities as server rack power levels continue to rise.
Both devices are housed in a TOLL (TO-Leadless) package and are targeted at high-current, high-power applications. The package incorporates a Kelvin Source connection, which minimizes parasitic inductance, improves switching behavior, and enables more stable operation under fast switching conditions.
The launch comes as demand accelerates for more efficient power semiconductors across AI infrastructure, electric vehicle charging systems, telecommunications equipment, and industrial power supplies.
Modern power architectures increasingly require:
- Higher conversion efficiency
- Improved thermal performance
- Greater power density
- Enhanced reliability
- Reduced system footprint
Super Junction MOSFET technology continues to play a critical role in achieving these objectives, particularly in AC-DC front-end stages, power factor correction (PFC) circuits, and high-voltage switching applications.
According to market research firm Omdia, the discrete semiconductor market serving computing and data storage applications is projected to grow from approximately $3.7 billion in 2025 to approximately $5.9 billion by 2030, representing a compound annual growth rate (CAGR) of roughly 9%.
The expansion of AI infrastructure, cloud computing, and high-density server architectures is expected to be a major driver of this growth, increasing demand for advanced power semiconductor solutions capable of delivering higher efficiency and greater power density.
Hyuk Woo, Chief Technology Officer of Magnachip, highlighted the importance of power semiconductor performance in next-generation systems, noting that growing demand across AI infrastructure, EV charging networks, and industrial power applications is creating increasing requirements for efficiency and reliability.
According to the company, the new 6th-generation SJ MOSFET platform combines low on-resistance, enhanced switching performance, and improved robustness to help customers optimize power conversion efficiency while reducing system size and thermal management requirements.
While developed with AI server power systems in mind, the new MOSFETs are also suitable for a broad range of high-efficiency power conversion applications, including:
- AI and cloud server power supplies
- Telecom infrastructure power systems
- Industrial power supplies
- EV charging equipment
- Data center power distribution
- High-power AC-DC converters
- Renewable energy power conversion systems
With the introduction of these devices, Magnachip continues to expand its power semiconductor portfolio to address the growing demand for efficient, reliable, and high-density power solutions across data center, industrial, and electrification markets.
Original – Magnachip Semiconductor