The Allen Bradley 140G molded case circuit breakers are suitable for a wide range of applications in low-voltage 3-phase power systems. 140G series circuit breakers can be reverse-fed. They provide overcurrent protection to conductors and other equipment, and they can be used as the main disconnecting devices for control panels. The 140G circuit breakers can also be used for branch circuit protection or as feeder breakers.
Browse available units in our catalog of 140G MCB.
This molded case circuit breaker accommodates a maximum current of 120 A and offers adjustable thermal as well as magnetic protection. It operates effectively at a rated insulation voltage of 1000 V a
The 140G-G6C3-C63 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.
The 140G-G3C3-C80 is a molded case circuit breaker designed for efficient performance. This device features a G frame size and is rated for up to 125 Amps. It incorporates fixed thermal and fixed magn
The 140G-G2C4-C32 represents a molded case circuit breaker with a G frame configuration. This unit supports 125 amperes and features a four-pole design, effectively managing electrical distribution. I
The 140G-G6C3-C45 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.
The 140G-KTF3-D40 Molded Case Circuit Breaker has a Adjust Thermal/ Adjust Magnetic Protection Type and a 7.17 lb Weight.
The 140G-H6C3-C25 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.65 lb Weight.
The 140G-H6F3-D10 Molded Case Circuit Breaker has a Adjust Thermal/ Adjust Magnetic Protection Type and a 2.65 lb Weight.
The 140G-H2C3-C15 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.65 lb Weight.
The 140G-J2F3-D10 Molded Case Circuit Breaker has a Adjust Thermal/ Adjust Magnetic Protection Type and a 5.51 lb Weight.
The Allen-Bradley/Rockwell Automation 140G MCB series is a series of molded case circuit breakers. According to the National Electrical Manufacturers Association (NEMA), a circuit breaker is a device designed to open and close a circuit by non-automatic means, and to open the circuit automatically at a predetermined overcurrent level without injury to itself when it is properly applied within its rating. The 140G MCB circuit breakers employ different methods to control the operating mechanisms. These methods include stored energy operation, dependent manual/power operation, and independent manual/power operation. When breakers in the 140G MCB family encounter an overcurrent, they can use instantaneous, inverse time delay, and definite time delay overcurrent releases. All these breakers from the Allen-Bradley 140G series of molded-case circuit breakers come with a frame rating of 125 Amps and an interrupting capacity that goes from 25 to 65 kA.
The Allen-Bradley 140G MCB series of circuit breakers are CCC, UL, and CSA certified since they comply with international standards such as the UL, CSA, and IEC standards. Since these circuit breakers have molded cases, they provide short circuit and thermal overcurrent protection by using either mechanical or electronic means. Note that the mechanical means use heater elements to detect the current flow and model the associated heat generated by the current. Additionally, molded case circuit breakers in this family feature either fixed or adjustable trip units. Whether they use fixed or adjustable magnetic and thermal trip units, the motor current rating of these circuit breakers should be less than or equal to 250% of the motor’s full-load ampere rating, or less than or equal to 300% for motors with a current of less than or equal to 100 amperes if the circuit trips on startup. Also, a circuit breaker in the 140G MCB series can be used with a motor current rating of less than 400% for motors with a current rating of more than or equal to 100 Amps if the circuit breaker trips on startup. The safety features of these breakers are capable of preventing accidents such as fires and explosions due to over-current or the overheating of conduits.