The Allen-Bradley 140U-I3C3-C20 Circuit Breaker is a 140G Molded Case Circuit Breaker that protects devices against short circuits or excessive circuits. It has a complete line of accessories that are field-installed and factory-installed and that have high breaking and interrupting capacities. It is suitable for applications in control panel protection. It conforms with international standards such as the UL489, CSA22.2 (No.5), and the IEC 60947-2 standards with various certifications including the CCC, UL Listed, CE Marked, and CSA Certifications. The Allen-Bradley 140U-I3C3-C20 Circuit Breaker is an I-Frame circuit breaker that has a mechanical lifespan of 25,000 operations total or 240 operations per hour and an electrical life of 8000 number of operations or 120 operations per hour at 415 Volts AC.

The 140U-I3C3-C20 Molded Case Circuit Breaker is assembled in a supporting case that includes the circuit breaker, operator, optional external accessories, and optional internal accessories. It has accessories such as trip indication contacts, an external rotary operator, auxiliary contacts, and a flex cable operator. It has an on and off switch, a button for testing the alarm trip and tripped positions. The 140U-I3C3-C20 Molded Case Circuit Breaker by Allen-Bradley/Rockwell Automation provides protection which includes adjustable magnetic/adjustable thermal protection, fixed thermal/magnetic protection, and adjustable electronic protection. It has a storage temperature range of -40 to 158 degrees Fahrenheit (-40 to 70 degrees Celsius), an operating temperature range of -13 to 158 degrees Fahrenheit (-25 to 70 degrees Celsius), a maximum ambient temperature of 104 degrees Fahrenheit (40 degrees Celsius) without derating, dimensions of 105 x 70 x 150 millimeters (4.13 x 2.76 x 5.9 inches), and an approximate weight of 3.7 kilograms (1.7 pounds).