140G-JC6I3-C40
This device operates in a current range of 40 Amps and is equipped with a JC frame. It features a rated insulation voltage of 1000 volts and can endure impulse withstand voltages of up to 8 kV. Weighi
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Allen Bradley 140G MCB
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.
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Browse 140G MCB
Browse available units in our catalog of 140G MCB.
140G-JC6I3-C60
This circuit breaker utilizes electronic LSIG protection with a current handling range of 60 amps. It is capable of withstanding a rated insulation voltage of 1000V and impulse withstand voltages reac
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140G-JC6I3-D10
This molded case circuit breaker operates at a rated current of 100 A. It supports insulation voltages of up to 1000 V and withstands impulse voltages of 8 kV. With a weight of 5.51 lb, the design inc
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140G-JTC4-C32
This circuit breaker operates with a current range of 32 A and is equipped with a J frame. It offers a rated insulation voltage of 1000 volts and withstands impulse voltages of up to 8 kV. The device
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140G-JTC4-C70
This particular model operates at a rated insulation voltage of 1000 volts and can withstand impulse voltages reaching 8 kV. Weighing in at 7.72 pounds, the breaker is engineered to endure a mechanica
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140G-JTF4-C80
This circuit breaker is built with a J frame structure. It supports an insulation voltage rating of 1000 volts and can endure impulse voltages of 8 kV. Weighing 7.72 pounds, it is recognized for its d
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140G-JTH4-C40
This circuit breaker features four poles, operating with a current range of 40 A. It has a rated insulation voltage of 1000 V and can withstand impulse voltages of 8 kV. Weighing 7.72 lb, it is design
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140G-K15K3-D30
This K-frame circuit breaker features electronic LSIG and MM protection and operates with a rated current of 300 Amps. It has a rated insulation voltage of 1000 V and withstands impulse voltages of 8
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140G-K15K4-D40
This circuit breaker operates on an electronic LSIG and MM protection scheme and features four poles. It is rated for a current range of 400 A and withstands insulation voltages of up to 1000 volts. T
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140G-K15X4
This four-pole circuit breaker operates under a rated insulation voltage of 1000 volts, providing strong electrical insulation. Additionally, it withstands impulse voltages as high as 8 kV, which offe
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About 140G MCB
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.