The Allen-Bradley 140G-G3C3-C70 circuit breaker is a circuit breaker that consists of a protective unit that is applied mainly to limit short circuit currents quickly in industrial systems. It is distributed by Allen-Bradley/Rockwell Automation. This breaker has 2 different detection mechanisms. One of them is made of 2 metal parts that receive the heat produced by currents. The other mechanism consists of a magnet that responds mainly to short-circuit currents. These 2 mechanisms are capable of detecting different types of abnormal currents and other parts of the breaker are in charge of performing a tripping action when an abnormal current is detected. 

The Allen-Bradley/Rockwell Automation 140G-G3C3-C70 circuit breaker features 3 poles and it belongs to the G Frame series and it comes with a frame rating of 125 Amps. This breaker also comes with an interrupting capacity of 35 kA at a voltage of 480 Volts AC. The specifications of the Allen-Bradley/Rockwell Automation 140G-G3C3-C70 circuit breaker might be affected when it is exposed to temperatures above 40 degrees Celsius or below 0 degrees Celsius because the breaker employs heat to detect currents. Different variables such as position, vibrations, and altitude do not affect the breaker in a significant way. It has been proven that the Allen-Bradley/Rockwell Automation 140G-G3C3-C70 circuit breaker has a faster reaction time than other types of breakers such as the hydraulic-magnetic type, which require 10 milliseconds or even more time to stop a current flow. The 140G-G3C3-C70 circuit breaker’s speed is achieved in spite of its small and simple design.