T9-817 PCB-Mount Circuit Breakers Schurter T9-817 PCB-Mount Circuit Breakers are single-pole thermal circuit breakers with THT terminals for PCB mounting. The T9-817 series features a cycling trip-free release with different mounting possibilities and a compact design. The T9-817 circuit breakers meet IEC 60934, UL 1077, CSA C22.2 No. 235, and GB 17701 standards. Applications for Schurter T9-817 PCB-Mount Circuit Breakers include power supplies, uninterruptible power supplies (UPS), power tools, industrial appliances, HVAC, and household appliances.