140G-H3C4-C60
This circuit breaker features four poles and operates within a current range of up to 60 Amps. The protection is provided through fixed thermal and magnetic mechanisms. It supports a rated insulation
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4.7
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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-H3F3-D11
This circuit breaker, with adjustable thermal and magnetic protection, is created to enhance operational safety. It manages a current range of up to 110 A and maintains a rated insulation voltage of 1
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4.5
140G-HC0C3-C40
This model is built with an HC frame and specifies a current range of 40 A. The insulation voltage of the circuit breaker is rated at 1000V, while it is capable of withstanding impulse voltages of up
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4.7
140G-I2C4-D17
This circuit breaker features four poles and operates within a current range of 170 A, providing fixed thermal and magnetic protection. It interrupts fault currents up to 25 kA and meets insulation vo
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4.6
140G-J3I3-C40
Designed as a J frame circuit breaker, the 140G-J3I3-C40 supports a current range of 40 A. It withstands rated insulation voltages of 1000 V and impulse withstand voltages of up to 8 kV. Weighing 5.51
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4.9
140G-J3I4-C60
This circuit breaker features a four-pole configuration and operates within a current range of 60 A. It has a rated insulation voltage of 1000 V and an impulse withstand voltage rating of 8 kV. Weighi
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4.7
140G-J3I4-D15
This circuit breaker features electronic LSIG protection with four poles and supports an operational current range of 150 A. It can handle rated insulation voltages of 1000 V and withstand impulse vol
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4.7
140G-J6F3-D11
This model operates within a current range of 110 A and has a rated insulation voltage of 1000V. With a rated impulse withstand voltage of 8 kV, it provides enhanced durability against voltage spikes.
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5.0
140G-J6X4
This breaker is equipped with a four-pole design and is built in a J-frame structure. It has an insulation voltage rating of 1000 Volts and is capable of withstanding impulse voltages of up to 8 kV. W
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5.0
140G-JC0H3-C40
Constructed with a JC frame, this breaker supports a current handling range of up to 40 Amps. It features an electronic LSI protection mechanism for efficient performance. The unit operates at a rated
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5.0
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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.