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 has a maximum current rating of 400 A and an impressive insulation voltage rating of 1000 V. It can withstand impulse voltages of up to 8 kV. Weighing 7.17 lbs., it su
The 140G-G3C4-C30 is classified as a molded case circuit breaker that operates with a 125 amp capacity. This breaker is designed with a G frame and uses four poles for versatile applications. It maint
Operating in the 170 Amp current range, the 140G-J3F3-D17 breaker is rated for insulation up to 1000 Volts. It withstands impulse voltages of 8 kV. Weighing 5.51 pounds, the device supports a mechanic
The 140G-JTF3-D17 Molded Case Circuit Breaker has a Adjust Thermal/ Adjust Magnetic Protection Type and a 5.51 lb Weight.
This breaker model has four poles and includes a current handling capability of up to 400 A. The rated insulation voltage reaches 1000 volts, providing ample safety for demanding tasks. Furthermore, i
Suitable for 1200 A operations, the 140G-NS0H3-E12 maintains a rated insulation voltage of 1000 volts and can withstand impulse voltages of 8 kV. The device, weighing 27.56 pounds, incorporates electr
The Allen Bradley 140G-G2C4-C35 is a molded case circuit breaker designed to meet diverse electrical protection needs. With a robust and compact G-frame construction, this unit supports a rated curren
The model 140G-G3C4-C35 is a molded case circuit breaker employed as part of the G frame series. It supports a maximum current rating of 125 Amps and provides an interrupting capacity of 35 kA. This c
As part of the 140G series, the 140G-G3C4-D11 delivers reliable circuit protection with a fixed thermal trip set at 110 amps and a magnetic trip capability of 1100 amps. This unit supports a maximum i
The 140G-J2H3-D25 J-frame breaker has a rated insulation voltage of 1000 V and withstands impulse voltages up to 8 kV. Weighing 5.51 pounds, this unit allows for a mechanical life rating of 240 operat
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.