ROHM has developed a new lineup of 600 V Super Junction MOSFETs aimed at higher-efficiency, higher-power-density power conversion, including power supplies for AI servers and data centers. The lineup includes the R60xxXNx series and the PrestoMOS R60xxWNx series, both offered in new surface-mount package options intended to improve heat dissipation in compact designs.
The new devices add two surface-mount packages to ROHM’s existing Super Junction MOSFET package lineup: DFN8080-5L (8.0 × 8.0 × 0.85 mm) and TOLL (11.68 × 9.9 × 2.3 mm). ROHM points to the combination of a low-profile form factor and higher thermal performance as a fit for designs that are space constrained but still chasing higher output power, such as AI server power supplies and industrial equipment.
On electrical characteristics, ROHM set the gate threshold voltage VGS(th) to a 3 V to 5 V range that’s common in standard products, targeting broad drive-condition compatibility. ROHM also says the parts improve admittance characteristics to increase versatility and reduce loss compared with the company’s conventional R60xxYNx series and PrestoMOS R60xxVNx series. And by using surface-mount packages with market-common footprints, the company is aiming at drop-in practicality for existing power-supply circuits, including second-source planning.
The lineup includes 21 models in the high-speed switching R60xxXNx series and 11 models in the PrestoMOS R60xxWNx series. ROHM describes the R60xxWNx family as having “class-leading” high-speed recovery characteristics, which matters most in topologies where diode reverse recovery shows up directly in switching loss and heat that the package and PCB stack-up then have to carry away.
Mass production began sequentially in June 2026. Online sales have started for TOLL-package parts, including R6020XNJ2, R6038XNJ2, R6049XNJ2, R6055XNJ2, R6024WNJ2, and R6035WNJ2, through distributors such as DigiKey. ROHM also says it plans to expand its Super Junction MOSFET lineup with 650 V products and next-generation products.
Source: ROHM
