The Allen-Bradley 140U-H6C3-C80-A-MT Circuit Breaker is a Molded Case Circuit Breaker that offers protection against overcurrent for industrial equipment and conductors because it automatically opens before the current gets to the highest-rated level and a value that can release heat and reduce excessive temperatures in the conductor’s insulation. It also acts as the main control panel power disconnecting device. The protection features involves short circuit protection and overcurrent protection at low levels. The 140U-H6C3-C80-A-MT Molded Case Circuit Breaker (MCCB) by Allen-Bradley/Rockwell Automation provides safe applications for industrial control panels. When selecting the right circuit breaker for a machine or application, certain things need to be considered such as the short circuit current that is available, the voltage of the applications, the wiring or load amperage that needs to be safeguarded, and the local code specifications.

The 140U-H6C3-C80-A-MT Circuit Breaker has various internal electrical accessories such as auxiliary contact (AX) which shows whether the MCCB is on or off, alarm contact (AL) that shows the circuit breaker's trip status, and the thermal trip contact (TU) that only trips during the circuit breaker's detection of an overcurrent or short-circuit. The alarm trip can be started by pressing the test button on the MCCB, trip as a result of a short circuit or overcurrent, or trip as a result of the shunt release signals due to under-voltage or residual current situations. The Allen-Bradley 140U-H6C3-C80-A-MT Circuit Breaker has a maximum ambient operating temperature of 40 degrees Celsius (104 degrees Fahrenheit) without derating, a storage temperature range of -40 to 80 degrees Celsius (-40 to 176 degrees Fahrenheit), and dimensions of 90 x 82.5 x 130 millimeters. It weighs 1.2 kg (2.65 pounds). It has a 3-pole configuration device with an H Frame, a frequency rating of 50/60 Hertz, and a current rating of 80 Amps.