Key challenges
Solid-state circuit breakers (SSCBs) exhibit higher on-state resistance compared to mechanical contacts, resulting in additional heat generation and increased cooling demands. High-power applications often require series or parallel configurations to manage voltage and current constraints, while bidirectional current flow in DC systems adds design complexity. These devices can be sensitive to overcurrents, raising concerns about short-circuit robustness and thermal runaway. Additionally, SSCBs tend to have higher upfront costs in high-power systems, and their fast switching behavior can introduce significant electromagnetic interference (EMI).
Many of these issues are being addressed by wide-bandgap (WBG) semiconductors like silicon carbide (SiC) and gallium nitride (GaN). WBG devices offer lower conduction losses, faster switching, higher operating temperatures, and higher ruggedness than silicon. While silicon remains a cost-effective option for many applications, WBG technology is maturing and promising reduced costs and wider adoption in SSCBs.
Our products and solutions
STMicroelectronics provides a complete ecosystem of components to accelerate the development of advanced solid-state circuit breakers (SSCBs).
- An extensive power switch portfolio with cutting-edge wide bandgap materials like SiC and GaN alongside proven silicon IGBTs and MOSFETs for optimal performance and cost flexibility.
- Our versatile STM32 microcontrollers enable sophisticated control and protection.
- A full suite of wired and wireless connectivity solutions enabling seamless integration into modern grids.