The 140U-H0C3-C50 circuit breaker by Allen-Bradley has a current rating of 40 Amps with an H Frame enclosure. At 480 Volts AC voltage, the circuit breaker has a breaking capacity or interrupting rating greater than 100 kiloamps. This three-pole breaker also comes with a fixed thermal trip unit as well as a fixed magnetic trip unit. The 140U-H0C3-C50 circuit breaker belongs to the Bulletin 140U series which includes circuit breakers that are rated for 15 to 1200 Amps of current and that also features either thermal-magnetic trip mechanisms or electronic trip mechanisms. The Frame H circuit breakers have a maximum current rating of 125 Amps and they also adhere to various standards including the CCC, KEMA, CE, UL 489, and the IEC 60947-2 standards. It also has a thermal-magnetic trip unit.

The Allen-Bradley 140U-H0C3-C50 circuit breaker is specially designed and intended to protect the electrical circuits against short circuits, overloads, and ground faults. The 140U MCB circuit breakers can function as a device for the main circuit protection or the branch circuit protection in panelboards, switchboards, and enclosures. It has a power dissipation rating of 15 Watts. At a frequency of 60 Hertz, the circuit breaker has interrupting rating specifications of 200, 100, and 35 kiloamps at 240, 480, and 600 Volts AC, respectively. The 140U-H0C3-C50 circuit breaker requires a nominal operational environment with an ambient temperature ranging between 16 and 140 degrees Fahrenheit. Some of the mechanical specifications of this circuit breaker are a weight of about 3 pounds and approximate dimensions of 139.7 x 50.8 x 76.2 millimeters. There are compatible shunt trips from Allen-Bradley for applications that require the remote tripping of the Allen-Bradley 140U-H0C3-C50 circuit breaker.