The 140U-H6C3-C50-A-MT circuit breaker is a molded case circuit breaker that is designed and manufactured by Allen-Bradley/Rockwell Automation. This circuit breaker unit is part of the 140U product series and it is used in different industries. The 140U product series offers circuit breaker variants that will meet the demands of applications with different levels of difficulty, along with several different custom options that can further extend its capabilities. The 140U-H6C3-C50-A-MT circuit breaker is used around the world and it is made according to requirements specified in standards such as the CSA, UL, CE, and CCC standards. The 140U-H6C3-C50-A-MT circuit breaker comes with an H frame and it has a current rating of 125 Amps (maximum). Also, the unit features fixed thermal and fixed magnetic protection, high interrupting rating, flex cable operating mechanism, and a rotary operating mechanism with variable depth.

The 140U-H6C3-C50-A-MT circuit breaker features interrupting rating or breaking capacity of 60 to 69 kiloAmps and it has three poles. The unit is IP2X rated and it operates within any typical industrial environment. The specified operating temperature range is from -25 to 60 degrees Celsius (-13 to 140 degrees Fahrenheit) and the unit can be stored at a temperature between -40 and 80 degrees Celsius (-40 and 176 degrees Fahrenheit). The 140U-H6C3-C50-A-MT circuit breaker includes a multi-tap terminal lug kit and one auxiliary contact which is an optional element. In regard to the mechanical characteristics of the device, the 140U-H6C3-C50-A-MT circuit breaker has 30 G of shock resistance and 18 G of vibration resistance. The lifespan of the device is up to 100,000 operations (mechanical) and 10,000 operations (electrical).