The 140U-H6C3-C50-B circuit breaker is a circuit breaker with a molded case from Allen-Bradley/Rockwell Automation. The unit is part of the 140U product series which offers different frame sizes and current ratings from 30 to 2500 Amps. The product series offers several different internal control modules and control module combinations in order to meet the requirements of specific applications, along with circuit breaker versions with one, two, or three poles. In addition to that, the 140U series provides accessories that can be added in the factory or installed in the field. Some of the features of these circuit breakers are rotary variable-depth operating mechanisms, flex cable operating mechanisms, and high interrupting ratings.

The 140U-H6C3-C50-B circuit breaker complies with standards such as the UL 489, IEC 60947-2, CE, CSA C22.2 (No. 5), and the CCC standards. This CE marked device is built according to the regulations set in these standards and it is strictly intended for use in an industrial environment. The 140U-H6C3-C50-B circuit breaker comes with an H frame and it has a current range of 15 to 125 Amps. The interrupting rating or breaking capacity of the unit is 60 to 69 kiloAmps and it includes fixed thermal and fixed magnetic protection. This 140U circuit breaker device has three poles and two auxiliary contacts. The included optional auxiliary contacts are internal control modules that are available through this series. The 140U-H6C3-C50-B circuit breaker has an IP2X rating when it is wired and it can operate within a temperature range of -25 to 60 degrees Celsius (-13 to 140 degrees Fahrenheit).