The 140U-H0C3-C25 circuit breaker is a Bulletin 140U circuit breaker. Allen-Bradley 140U series circuit breakers offer 15 to 800 Amps current ratings with thermal-magnetic trip modules and 70 to 200 Amps current ratings with electronics trip modules. Molded case switches from the 140U series are available in 125 to 1200 Amps current ratings for these circuit breakers. The 140U-H0C3-C25 circuit breaker comes in an H-Frame enclosure and it has an operating current rating of 25 Amps. The current rating of the H-Frame is 125 Amps. The interrupting rating for the 140U-H0C3-C25 circuit breaker is greater than 100 kiloamps. Trip unit on the breaker is a fixed thermal and fixed magnetic trip unit. The 140U-H0C3-C25 circuit breaker is a 3-pole breaker. The power loss during operation is 12 Watts.

The electrical specifications for circuit breakers from the Bulletin 140U series include a maximum current rating of 125 Amps and a frame rating of 125 Amps, insulation voltage for the main poles, and auxiliary circuit voltage ratings of 750 Volts AC and 690 Volts AC. It also has impulse withstand voltages of 6 kilovolts and 4 kilovolts respectively for the main conductors and the auxiliary contacts and a rated operational voltage of 690 Volts AC according to the IEC at 50 Hertz. The 140U-H0C3-C25 circuit breaker complies with the UL 489, CCC, KEMA, CSA 22.2, and IEC 60947-2 standards. The ambient operating temperature range is 16 to 140 degrees Fahrenheit. The mechanical specifications for the 140U-H0C3-C25 circuit breaker include a weight of 3 pounds and frame dimensions of 5.5 x 3 x 3 inches. The main electrical power to the system must be disconnected prior to initiating any activity related to the installation or servicing of circuit breakers and other electrical equipment. Failure to do so can lead to injury and equipment damage.