The 140G-M0X3 breaker frame by Allen-Bradley is a breaker frame for the M Frame circuit breaker family. The 140G-M0X3 breaker frame is a factory-supplied M Frame circuit breaker frame that provides overcurrent protection and thermal overload protection, and it can also be used as a switching device. The 140G-M0X3 breaker frame is suitable for 480 Volts AC applications/circuit, and it has a maximum operating voltage rating of 600 to 690 Volts AC per the UL, CSA, and IEC standard ratings. This circuit breaker frame has 3-pole wiring, with both line and load side bolt-on standard terminals for easy field installation. The 140G-M0X3 breaker frame has a maximum current rating of 800 Amps, and a maximum breaking capacity of 65 kA at 480 Volts AC.

The Allen-Bradley 140G-M0X3 breaker frame has a voltage withstand rating of 8 KiloVolts, and an insulation voltage rating of 1000 Volts AC. The 140G-M0X3 breaker frame has a mechanical lifetime rating of around 20,000 operations, and it also has an electrical lifespan rating of about 5000 operations at 415 Volts AC. The 140G-M0X3 breaker frame comes as a frame only, but it has snap-in accessory slots for various internal accessories like the auxiliary alarm, the auxiliary contact that can be used for indicating if the breaker is ON or OFF, and the shunt trip that allows for remote tripping. It provides a 1-meter-long pigtail wiring that provides simplified termination to internal accessories as a standard feature. The 140G-M0X3 breaker frame has an 80% efficient continuous load rating at 40 degrees Celsius, and it can be stored within a temperature range of -40 to 80 degrees Celsius. It has mounting dimensions of 210 x 103.5 x 268 millimeters, and an average shipping weight of 12.1 kilograms.