The 140U-H0C3-D10 Circuit Breaker is part of the Bulletin 140U series of MCB circuit breakers by Allen-Bradley. This circuit breaker series provides a current range of 15 to 800 Amps with THE thermal-magnetic trip modules and 70 to 200 Amps with the electronics trip modules. The 140U-H0C3-D10 circuit breaker features an H-Frame enclosure with 125 Amps of operating current rating and an interrupting rating or breaking capacity of 100 kiloamps. The circuit breaker also comes with a fixed thermal trip unit and a fixed magnetic trip unit. The Allen-Bradley 140U-H0C3-D10 Circuit Breaker is a three-pole circuit breaker with a power loss of 12 Watts while in operation. It complies with the CSA 22.2, UL 489, IEC 60947-2, KEMA, and CCC standards.

The circuit breakers in the Bulletin 140U MCB series like the 140U-H0C3-D10 Circuit Breaker come with various electrical specifications including maximum current and frame ratings of 125 Amps. It also has an insulation voltage for the main poles, as well as auxiliary circuit voltage ratings of 750 and 690 Volts AC. The Allen-Bradley 140U-H0C3-D10 Circuit Breaker has impulse withstand voltage ratings of 4 kilovolts and 6 kilovolts for the auxiliary contacts and main conductors, respectively, as well as a rated operational voltage of 690 Volts AC in line with the IEC standards at 50 Hertz. Other notable specifications of the 140U-H0C3-D10 Circuit Breaker include an ambient operating temperature range between 16 and 140 degrees Fahrenheit. It weighs approximately 3 pounds with a frame measuring 5.5 x 3 x 3 inches. Before the operators initiate any activity relating to the servicing or installation of the circuit breaker, the main electrical power system must be disconnected to prevent injury or equipment damage.