The 140UE-M7X3 circuit breaker is a three-pole molded case circuit breaker. It is part of the Bulletin 140UE family from Allen-Bradley and comes in an M-frame enclosure. The current rating for the 140UE-M7X3 circuit breaker is 800 Amps. The mounting hardware and terminal lugs for the 140UE-M7X3 circuit breaker need to be ordered separately from the manufacturer. At 60 Hertz line frequency, the interrupting rating specifications are 35 kiloamps at 600 Volts AC, 65 kiloamps at 480 Volts AC, and 100 kiloamps at 240 Volts AC. At 50 Hertz line frequency, the ultimate breaking capacity specifications for the breaker are 25 kiloamps at 690 Volts AC, 35 kiloamps at 500 Volts AC, 70 kiloamps at 380 to 415 Volts AC, and 100 Amps at 220 to 240 Volts AC.

The standards met by the 140UE-M7X3 circuit breaker include the IEC 60947-2, KEMA-KEUR, and CE standards. The power dissipated by the breaker during operation is 290 Watts. The rated insulation voltage according to the IEC 60947-2 standards for the 140UE-M7X3 circuit breaker is 750 Volts for the main poles and 690 Volts for the auxiliary circuit. The rated impulse withstand voltage for the main conductors is 8 kilovolts and for the auxiliary contacts, it is 4 kilovolts. The recommended ambient temperature range for the 140UE-M7X3 circuit breaker is from 16 to 140 degrees Fahrenheit. The approximate weight of the circuit breaker is 43.9 pounds. The dimensions of the breaker enclosure are 16 x 8.25 x 4.05 inches (H x W x D). If remote tripping of the 140UE-M7X3 circuit breaker is required, then a shunt trip can be used for this purpose. A shunt trip is an accessory that is available from Allen-Bradley.