140G-J2H4-C60
This breaker model features a J frame design and operates with four poles. It offers electronic LSI protection, a rated current of 60 A, and a maximum current of 250 A. The circuit breaker is rated fo
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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-J3H4-D15
Designed for reliable circuit protection, the 140G-J3H4-D15 operates at a maximum rated insulation voltage of 1000 volts and supports a current range up to 150 Amps. It includes an interrupting capaci
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4.9
140G-J6H4-D25
Specializing in electronic LSI protection, this model includes four poles and operates within a current range of 25 A. It is rated to handle insulation voltages of 1000 volts and impulse withstand vol
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4.9
140G-J6I3-D15
Designed for diverse applications, this breaker supports a current range up to 150 A. It is rated for 1000 volts of insulation and can withstand impulse voltages up to 8 kV. Weighing 5.51 pounds, it o
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4.8
140G-J6I4-D15
This circuit breaker includes four poles and operates with electronic LSIG protection. It has a current range of up to 150 Amps and can function safely at a rated insulation voltage of 1000V. The devi
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4.9
140G-JC0F3-C90
This circuit breaker operates with an adjustable thermal and magnetic protection system and features a current range of 90 A. It supports a rated insulation voltage of 1000 V and can withstand impulse
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4.7
140G-JC0I3-C40
Featuring an electronic LSIG protection mechanism, this circuit breaker can manage a current range of 40 A. It is rated for insulation up to 1000V and withstands impulse voltages of 8 kV. Weighing 5.5
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140G-JC6C3-C60
Part number 140G-JC6C3-C60 features a JC frame and can handle a current range of up to 60 A. It is rated for an insulation voltage of 1000 V and withstands impulse voltages of 8 kV, ensuring reliable
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140G-JC6F3-D12
Designed with a frame size of JC, the 140G-JC6F3-D12 operates within a current range of 120 A. It has a rated insulation voltage of 1000 volts and can withstand impulse voltages of up to 8 kV. Weighin
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140G-JTC3-C30
With a rated insulation voltage of 1000 volts and an impulse withstand voltage of up to 8 kV, this circuit breaker provides robust protection. The device is engineered for a mechanical lifespan of 240
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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.