ROHM’s EcoSiC used in COSEL’s 3.5kW AC/DC units

Incorporating ROHM SiC MOSFETs and SiC SBDs into the forced air-cooled HFA series and conduction-cooled HCA series achieves up to 94% efficiency. The HCA series has been mass produced since 2023, while the HFA series began mass production in 2024.

Many industrial applications that handle high power in the industrial sector, including MRI machines and CO2 lasers, require three-phase power supplies that differ from the single-phase power supplies used in households. COSEL’s AC/DC power supply units – equipped with ROHM’s EcoSiC technology that excels in high-temperature, high-frequency, high-voltage environments – are compatible with three-phase power supplies from 200VAC to 480VAC, contributing to improved power supply efficiency across a wide range of industrial equipment worldwide.

Jun Uchida, General Manager, New Product Development Dept. 2, COSEL, said: “The HFA/HCA series achieve high efficiency despite delivering a high-power output of 3.5kW by incorporating ROHM's low-loss SiC power devices. Operating at high input voltages typically poses a challenge in reducing losses in high-voltage power devices, but using SiC power devices translates to significantly lower losses compared to conventional solutions, resulting in power supplies that maintains high efficiency and power density even under demanding high-power conditions.”

Akihiro Hikasa, Group General Manager, Power Devices Business Unit, SiC Business Section, ROHM, said: “We are delighted to support COSEL, an industry leader in power supply systems, by providing SiC power devices. A leading company in SiC power devices, ROHM also provides comprehensive power solutions that combine peripheral components. In addition, by addressing customer issues, we also improve device performance by incorporating the insights gained into our products. Going forward, we will continue to collaborate with COSEL to contribute to a sustainable society by enhancing the efficiency of industrial equipment that handle large amounts of power.”

HFA/HCA Series 3.5kW Output AC/DC Power Supply Units for three-Phase Power Supplies The HFA/HCA series are 3.5kW power supplies featuring a wide input range (200VAC to 480VAC) that meets global power supply requirements. This allows them to be used anywhere in the world without the need to modify the power supply for each region, contributing to the standardisation of application designs. Both forced air-cooled (HFA series) and conduction-cooled (HCA series) models – selectable based on operating environment – are available in 48V and 65V output voltage variants that can be used as power sources for a variety of high-power applications such as laser generation and MRI.