Magnachip Semiconductor has introduced eighth-generation 40 V and 60 V medium-voltage (MV) MOSFETs aimed at server and high-performance PC power supply units, targeting the synchronous rectification (SR) stage. For data center power designers, the practical pitch is straightforward: lower conduction loss and faster switching in SR devices can translate directly into higher-efficiency PSUs and easier thermal management at high load.
The new parts use Magnachip’s Advanced SGT technology. Magnachip states the 40 V devices deliver up to a 40% improvement in current density and about 25% faster switching speed versus the prior generation. For the 60 V devices, Magnachip states up to a 50% improvement in current density and 60% faster switching speed compared to the previous generation. The company also says it applied fast anti-parallel diode technology to dissipate residual current generated during switching, intended to improve overall system stability.
All of the devices support operating temperatures up to 175°C and use a PDFN56 package, a combination that points to dense layouts and high-temperature headroom in compact PSU designs. Magnachip says the MOSFETs are built to meet JEDEC standards and are also intended for use in solar inverters and industrial power systems where efficiency and reliability are priorities.
The lineup expansion follows a 0.7 mΩ, 40 V product launched in May 2025. Magnachip is adding three more eighth-generation MV MOSFETs: 0.8 mΩ 40 V, 1.0 mΩ 40 V, and 1.05 mΩ 60 V devices. In practice, having multiple RDS(on) bins at the same voltage class matters because SR stage designs often come down to a few milliohms of conduction loss versus switching loss tradeoffs, plus whatever thermal budget and layout constraints the PSU team is boxed into.
“These new products are expected to serve as a solution that can enhance both efficiency and reliability in server and high-performance PC power systems,” said Hyuk Woo, chief technology officer of Magnachip.
Magnachip lists the parts under its MXT MV MOSFET series, with product-category pages for 40 V and 60 V devices.
Source: Magnachip Semiconductor
