The Allen-Bradley/Rockwell Automation 140U-JD6X3 circuit breaker is an exceptional circuit breaker from the Allen-Bradley 140U product series. This product series covers thermal-magnetic circuit breakers with both non-adjustable and adjustable magnetic trips. The circuit breakers from the 140U series are available as molded case circuit breakers that offer industry-grade protection from short-circuits and overcurrents. Also, the 140U series provides a wide range of accessories and optional elements that can contribute to specific tasks. The 140U-JD6X3 circuit breaker is a circuit breaker with a frame that has a JD mark. The JD frame circuit breakers like this one are used in combination with soft starter units and they include the thermal-magnetic and the adjustable magnetic protection types.

The 140U-JD6X3 circuit breaker frame has a designated input voltage of 480 Volts and it includes 3 poles. The JD frame circuit breakers like this one have a magnetic trip range of 1250 to 2500 Amps and a continuous current rating of 250 Amps. The 140U-JD6X3 circuit breaker's frame has all the required insulation and protective features it needs to operate safely and it features small dimensions that allow more space for other components. The interrupting rating or breaking capacity of the circuit breaker unit for which the 140U-JD6X3 circuit breaker frame is intended is 60 to 69 kiloAmps. In addition to that, the current rating of the circuit breaker is 100 rr0 Amps. The 140U circuit breakers achieve an IP2X protection level when they are wired and they are made for typical industrial operating conditions. The allowed operating temperature range is -25 to 60 degrees Celsius (-13 to 140 degrees Fahrenheit) while the storage temperature range is -40 to 80 degrees Celsius (-40 to 176 degrees Fahrenheit).