Airpax UPL111-1-64-403 is a three-pole magnetic circuit breaker in the Airpax/Sensata UPL family, rated for 40 A. It employs a magnetic (hydraulic) trip mechanism for overcurrent protection and is designed for panel-mount installations in 50/60 Hz systems. The UPL111-1-64-403 part number encodes a 3-pole unit with a 40 A rating, where '64' reflects the delay/characteristic code and '403' the current rating, per Airpax/Sensata documentation. This breaker is commonly used in power-distribution panels for industrial and aerospace equipment, where robust, resettable overcurrent protection is required.
