The 140U-H2C3-C70-A Circuit Breaker is a circuit breaker by Allen-Bradley/Rockwell Automation that is manufactured as part of the 140U MCB series. This module has a Frame H frame rating of 125 Amps with an interrupting rating or breaking capacity range of 20 to 29 kiloamps at 480 Volts AC. It is a three-pole fixed thermal circuit breaker or fixed magnetic circuit breaker. Also, this molded case circuit has a current range of 700 Amps with one auxiliary contact internal control module. The breaker enclosure dimensions measure approximately 5.5 x 2 x 3 inches and it weighs 1.36 kilograms. The 140U-H2C3-C70-A Circuit Breaker offers an overload as well as short-circuits protection. It can also function as the primary protection source in a machine. It can also be used as a device for branch circuit protection for individual enclosures, panelboards, and bus-bar trunking tap-offs. This circuit breaker meets various standards such as the CCC, CE, CSA, and KEMA-KEUR standards.

When operating, the 140U-H2C3-C70-A Circuit Breaker has a heat dissipation rating of 20 Watts of energy. At 50 Hertz, the circuit breaker has an ultimate breaking capacity and service breaking capacity of 35 kiloamps each at 220 to 240 Volts AC. It has an ultimate breaking capacity and service breaking capacity of 25 kiloamps each at 380 to 415 Volts AC, an ultimate breaking capacity 22 kiloamps, a service breaking capacity of 17 kiloamps at 525 Volts AC, a service breaking capacity of 3 kiloamps, and a 3 Amps ultimate breaking capacity at 690 Volts AC. When installing a high voltage and current device like the 140U-H2C3-C70-A circuit breaker, all the necessary precautions relating to electrical systems should be taken, or severe injury or equipment damage can occur.