140G-J3I3-D10
This circuit breaker operates on an electronic LSIG protection scheme and supports a current range of up to 100 A. It features a rated insulation voltage of 1000 volts and can endure impulse voltages
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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-J6F4-D16
This molded case circuit breaker is rated for a 160 Amp current range and consists of four poles. It provides adjustable thermal and magnetic protection features. The device supports rated insulation
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4.7
140G-J6F4-D22
Operating as a four-pole circuit breaker, the 140G-J6F4-D22 accommodates a current range of up to 220 A. It integrates adjustable thermal and magnetic protection, making it adaptable to various applic
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140G-J6I3-C40
This device features a J-frame and maintains a current range of 40 A. The rated insulation voltage is 1000 V, while it can withstand impulse voltages of up to 8 kV. Weighing 5.51 pounds, it includes e
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140G-JC0H3-D25
This molded case circuit breaker has a JC frame size and accommodates a maximum voltage of 1000 volts. It is rated to withstand impulse voltages of 8 kV. The device weighs 5.51 pounds and has a mechan
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140G-JC6F3-D15
This circuit breaker employs adjustable thermal and magnetic protection mechanisms. Its current range allows operation up to 150 A. Additionally, it supports a rated insulation voltage of 1000 V and w
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4.6
140G-JTC3-C50
The 140G-JTC3-C50 is designed with a JC frame and features a current range of 50 Amps. It operates with a rated insulation voltage of 1000 volts and can withstand impulse voltages of 8 kV. The device
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4.5
140G-JTF4-D15
This circuit breaker features a J frame and is equipped with four poles. It operates across a current range of 150 A. With a rated insulation voltage of 1000 V and an impulse withstand voltage of 8 kV
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4.8
140G-JTH4-C60
This circuit breaker is characterized by a J frame and operates effectively within harsh electrical environments, with a rated insulation voltage up to 1000 volts. Its capability to withstand impulse
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140G-JTH4-D25
Specializing in electronic LSI protection, this circuit breaker operates with four poles and supports a maximum current of 250 A. It can handle impulse voltages of 8 kV. The mechanical lifespan is rat
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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.