The Allen-Bradley 140U-K6D3-D17 Molded Case Circuit Breaker (MCCB) has a voltage supply of 480 Volts, a rated current of 175 Amps, and an interrupting rating of 65 kA. It is a K-Frame circuit breaker, it has a 3-pole configuration and an Ampere Interrupting Capacity (AIC) rating of 65 kA at 480 Volts. It offers both Fixed Thermal and Adjustable Magnetic protection. The internal control modules of the Allen-Bradley 140U-K6D3-D17 Circuit Breaker are either field-installed or factory-installed. They include Auxiliary Contact (AX), Alarm Contact (AL), a combination of both Auxiliary/ Alarm Contacts (AX/AL), Shunt Trip (SNT), and Undervoltage Release (UVT) modules. The Molded Case Circuit Breaker has a mounting module which is a standard busbar module with rear connecting studs that are made to be used with only a 141A Mounting System. It is important to follow the relevant installation instructions prior to the installation of  any accessories.

The 140U-K6D3-D17 Circuit Breaker is manufactured by Allen-Bradley/Rockwell Automation and it has various key features such as a compact design, an electronic trip unit rated at up to 400 Amps, and an extensive operating mechanism that suits a variety of panel configurations. The 140U-K6D3-D17 Circuit Breaker also has an interrupting capacity of 65 kA. Allen-Bradley offers circuits with protection against ground fault, overload, and short-circuit situations. It is used in various applications such as busbar trunking tap-offs, panelboards, individual enclosures, and switchboard applications. The K-Frame circuit breakers have a mechanical lifespan of 20,000 operations or 120 operations per hour and an electrical life (at 415 Volts AC) of 7000 to 5000 operations at 400 to 630 Amps or 60 operations per hour. It has a maximum ambient temperature of 40 degrees Celsius (104 degrees Fahrenheit) without derating and a storage temperature range of -40 to 80 degrees Celsius (-40 to 176 degrees Fahrenheit).