Airpax Electronics UPL1111-1-65F-503 Circuit Breaker

Airpax Electronics UPL1111-1-65F-503 is a magnetic circuit breaker in a molded phenolic case from Sensata Airpax, part of the AP/L UPL family. The 503 suffix denotes a 50 A nominal rating for 250 VAC circuits, with a trip current specified around 62.5 A, and the 65F identifier indicates this particular timing/characteristic variant within the UPL line. This device carries UL and CSA recognition as a component-appliance control, supporting use in certified panels and equipment. The part is also listed under alternate P/N UPL111165F503, reflecting typical cataloging variations. Designed for 250 VAC operation, it functions as a protective switch for power distribution in industrial controls, machinery, and other applications where reliable overcurrent protection is required. The combination of a high-current rating, a clear trip specification, and a robust molded-phenolic housing makes the UPL1111-1-65F-503 a purpose-built solution for protecting feeders and control circuits from overloads while meeting relevant safety certifications.