The Rockwell Automation/Allen-Bradley 140UE-L3X3 IEC Molded Case Circuit Breaker belongs to the 140U MCB product line. This circuit breaker has Frame L with a rating of 630 Amps with an interrupting rating or breaking capacity of 30 to 39 kiloamps at 400 Volts AC. It has the frame-only protection type with three poles. Other features of the 140U MCB circuit breaker series, as well as the 140UE-L3X3 Circuit Breaker, are factory or field-installed accessories, flex cable operating mechanisms, and rotary variable-depth operating mechanisms. It also features a thermal-magnetic current rating of 15 to 800 Amps, a molded case switch current rating of 160 to 1250 Amps, and an electronic current rating of 70 to 1250 Amps. The Frame L circuit breakers have approximated dimensions of 258 millimeters (height), 140 or 184 millimeters (width), and 104 millimeters (depth).

Additionally, the Allen-Bradley 140UE-L3X3 IEC Molded Case Circuit Breaker comes with a wide range of accessories. The internal accessories include alarm (trip) contacts, auxiliary shields, an auxiliary and alarm contact combination, a shunt trip, an under-voltage release, and field-installable options. There are also external accessories such as a pad-lockable hasp, terminal covers, terminal lugs, end cap kits, a slide bar interlock, and a plug-in base. These circuit breakers also feature the flex cable operating mechanisms, a direct coupler rotary, and variable depth rotary operating systems. The 140UE-L3X3 Circuit Breaker is certified and approved for compliance with the CE, KEMA-KEUR, and IEC 60947-2 standards. The 140U MCB Circuit Breaker supports assembling from the trap unit or frame, but it can also be purchased as a preassembled units. At 50 Hertz and 630 Amps, the circuit breaker has a breaking capacity 65 kilowatts at 220 to 240 Volts AC, 35 kilowatts at 380 to 415 Volts AC, 18 kilowatts at 500 Volts AC, and 12/9 kilowatts at 690 Volts AC.