P6SMB 600W SMT Transient Voltage Suppressors Taiwan Semiconductor P6SMB 600W Surface Mount Transient Voltage Suppressors offer a low-profile package for switching-mode power-supply applications. Transient voltage suppressor (TVS) are a classification of an array of devices that are designed to react to sudden or momentary overvoltage conditions. Taiwan Semiconductor P6SMB TVS suppressors are used in switching-mode power supplies (SMPS), adapters, televisions, and monitors.