The SCT40xxDLL series of SiC MOSFETs in TOLL (TO-Leadless) packages is now in mass  production from ROHM. These new packages provide about 39% improved thermal performance than traditional packages (TO-263-7L) with comparable voltage ratings and on-resistance.
Despite its small size and low profile, this allows for high-power handling. It is ideal for industrial equipment where low-profile components are needed to enable miniaturized product design, such as server power supply and ESS (Energy Storage Systems), where power density is rising.
Power MOSFETs are needed to produce increased power density in applications such as AI servers and compact PV inverters, where the trend toward higher power ratings meets with the contradictory need for miniaturization. Thicknesses of 4mm or less are required for discrete semiconductors, especially in totem pole PFC circuits for slim power supplies, sometimes referred to as “the pizza box type.”
In order to meet these demands, ROHM’s innovative product achieves a low profile of 2.3mm thickness, which is about half that of traditional packaged products, and reduces component footprint by around 26%.
Furthermore, while most standard TOLL package products are limited by a drain-source rated voltage of 650V, ROHM’s new products support up to 750V. This allows for lower gate resistance and increased safety margin for surge voltages, contributing to reduced switching losses.
The lineup consists of six models with on-resistance ranging from 13m? to 65m?, with mass production started in September 2025 (sample price: $37.0/unit, tax excluded). These products are available for online purchase from online distributors such as DigiKey, MOUSER and Farnell.
Simulation models for all six new products of SCT40xxDLL series of SiC MOSFETs are available on ROHM’s official website, supporting rapid circuit design evaluation.
Product Lineup
Application Examples
o Industrial equipment: Power supplies for AI servers and data centers, PV inverters, ESS (energy storage systems)
o Consumer equipment: General power supplies
