Design and Research of TVS Devices Based on Silicon Carbide Material

Surge disturbance can be generated by high power electromagnetic pulse coupling on the cable of electronic information equipment. Transient voltage suppressor (TVS) is an important protective device to suppress surge disturbance. Most of the existing TVS devices are Si-based materials, and Si-TVS devices have shortcomings in the current capacity, high-temperature characteristics, etc. In this paper, SiC materials are selected to design new SiC-TVS devices, and the surface leakage characteristics are improved by terminal junction expansion technology. The testing results show that the new SiC-TVS devices have better characteristics in current capacity and high temperature performance.