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 breaker utilizes adjustable thermal and magnetic protection technology and can handle 80 A of rated current and 250 A of maximum current. It supports a maximum rated insulation voltage of 1000 vo
This molded case circuit breaker features an H frame and can manage a current range of 120 A, ensuring effective circuit protection and performance. It operates at a rated insulation voltage of 1000 V
The 140G-J2F3-C90 Molded Case Circuit Breaker has a Adjust Thermal/ Adjust Magnetic Protection Type and a 5.51 lb Weight.
The 140G-G3C4-C32 is a four-pole molded case circuit breaker designed by Allen Bradley. It has a rated current capability of 125 amps and an interrupting rating of 35 kA, ensuring effective protection
In the 140G series, the 140G-G6E4-D16 is defined as a molded case circuit breaker with adjustable thermal protection and fixed magnetic tripping. This unit supports four poles and can handle a current
This unit has a current range of 25 A and utilizes electronic LSI protection. It is rated for insulation up to 1000 V and can withstand impulse voltages of 8 kV. Weighing 2.65 pounds, the device has a
The 140G-G3C4-C50 is a molded case circuit breaker featuring a G frame design, capable of handling a maximum current rating of 125 amps. It incorporates fixed thermal and magnetic protection mechanism
Featuring four poles, the 140G-H15C4-C63 circuit breaker supports a current range of up to 63A. It has a high interrupting rating of 150 kA, ensuring it can handle substantial fault current scenarios.
The 140G-G3C4-C16 is a molded case circuit breaker, designed for robust performance with a G frame construction. It handles a current range of 16 Amps while supporting a maximum rated insulation volta
The 140G-G6C4-C63 circuit breaker is designed with a G frame and includes four poles, accommodating a current range of 63 amps. It utilizes fixed thermal and magnetic protection to respond accurately
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.