ROHM has announced the development of a new lineup of surface-mount silicon carbide (SiC) Schottky barrier diodes (SBDs) designed to meet the evolving demands of high-voltage systems in xEVs and industrial applications. The SCS2xxxNHR series offers significant improvements in insulation resistance through an innovative package design that increases creepage distance, supporting enhanced safety and performance.
The initial release includes eight models for automotive applications such as onboard chargers (OBCs), with an additional eight models for industrial equipment, such as PV inverters and factory automation devices, set to launch in December 2024.
Enhanced Insulation and Efficiency for High-Voltage Systems
The rapid expansion of the xEV market has created demand for power semiconductors capable of handling high voltages and delivering low heat generation and high-speed switching. Compact surface-mount devices (SMDs) are increasingly preferred for their compatibility with automated assembly processes. However, the smaller creepage distances of traditional SMDs pose challenges in maintaining insulation and preventing high-voltage tracking.
ROHM’s new SiC SBDs address this challenge with a redesigned package that achieves a minimum creepage distance of 5.1mm, approximately 1.3 times greater than standard products. This enhancement eliminates the need for resin potting or additional insulation treatments, streamlining the assembly process and improving manufacturing efficiency.
Flexible Integration and Performance
ROHM’s SCS2xxxNHR series is designed for easy integration into existing systems. The package is compatible with the land patterns of conventional TO-263 products, enabling seamless replacement without the need for redesigns.
Two voltage ratings, 650V and 1200V, make the diodes suitable for both 400V systems commonly used in xEVs and the higher voltage systems anticipated to see broader adoption in the near future. For automotive applications, the SCS2xxxNHR series is AEC-Q101 qualified, ensuring the reliability required for critical systems such as onboard chargers and DC-DC converters.
Applications and Availability
The new ROHM SiC SBDs are suitable for:
- Automotive applications: Onboard chargers (OBCs) and DC-DC converters.
- Industrial equipment: AC servo motors for industrial robots, PV inverters, power conditioners, uninterruptible power supplies (UPS), and more.
The SCS2xxxNHR series for automotive applications is currently available, with the industrial-focused SCS2xxxN series scheduled for release in December 2024. The products are priced at $10.50 per unit for samples (excluding tax) and are available through distributors such as DigiKey™, Mouser™, and Farnell™.
EcoSiC™: ROHM’s Commitment to SiC Innovation
As part of its EcoSiC™ brand, ROHM leverages its in-house development capabilities to advance silicon carbide technology. From wafer fabrication to quality control, the company’s integrated production system ensures the delivery of high-performance power devices that meet stringent market requirements. ROHM remains committed to developing innovative solutions that drive energy efficiency and sustainability in automotive and industrial applications. For more information, please click here.
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