The 140U-H6C3-C20 circuit breaker is an Allen-Bradley circuit breaker from Allen-Bradley/Rockwell Automation. It is a three-phase breaker system which comes with three poles. By using three poles, the breaker can protect three circuits at a single time. The breaker is a 600 Volts input voltage rated unit and it comes with a current rating of 20 Amps. An on/off switch is present on the front panel of the breaker. The top and bottom end of the breaker is equipped with load and line lug terminals. The breaker can be bolt-in mounted to the cabinet space. The 140U-H6C3-C20 circuit breaker is conformally coated and it can withstand harsh environmental conditions. It has an instantaneous rating of 65 kA at 480 Volts AC. It also supports non-interchangeable trips. The breaker comes with enhanced features like long time and instantaneous trip functions. It supports both thermal and magnetic trips. The breaker weighs 2.7 pounds. It has dimensions of 8 x 6 x 4 inches.

By using a push-to-trip button, the 140U-H6C3-C20 circuit breaker can be tripped manually. This is usually done to check the breaker's functionality. This molded case circuit breaker comes enclosed in an H Frame. The breaker is connected to the factory machine system and it protects the machine circuitry when a current overload or short circuit condition occurs. The 140U-H6C3-C20 circuit breaker is certified with global standards like the UL, CSA, and CE standards and it is approved for worldwide operation. The operating frequency of the circuit breaker is 50/60 Hertz depending on the load. The breaker is equipped with a status indicator to show the current trip function.