The Allen-Bradley 140G-M6X3 molded case circuit breaker is a 3-pole completely assembled molded case circuit breaker with a frame from the M-frame series that is designed to provide overcurrent protection for conductors and connected equipment in both branch and feeder circuits. The 140G-M6X3 circuit breaker belongs to the M-Frame circuit breaker family and it is designed to provide short-circuit protection in a wide range of applications. The 140G-M6X3 circuit breaker has a maximum interrupting rating of 65 Kilo-Amps at 480 Volts AC (750 Volts DC), and it is designed for circuits with a nominal operating voltage of up to 600 Volts AC/750 Volts DC. The 140G-M6X3 circuit breaker has a continuous current rating of 800 Amps at 48 Volts AC and a 3-pole wiring design for 3-phase applications.

The 140G-M6X3 circuit breaker has an extended range of accessories that are easy to fit and field installable. This circuit breaker offers a wide range of mounting options (up, down, horizontal, or vertical) without affecting its tripping characteristics or ratings. It has an enclosure made of glass fiber moldings and reinforced synthetic resins, and operating parts made of a non-corrosive metal, making it the ideal choice for hot, humid, and harsh operating environmental conditions. The 140G-M6X3 circuit breaker has a designated maximum ambient operating temperature of 40 degrees Celsius and it can be field calibrated for higher ambient applications. It has a maximum operating altitude of 2000 meters. At a higher altitude, the circuit breaker will begin to de-rate. The 140G-M6X3 is CE, CCC, CSA, and UL certified, and it has approximate mounting dimensions of 210 x 103.5 x 268 millimeters.