140G-MTF3-D60
This circuit breaker functions effectively within a current range of 600 amps. It is rated for insulation voltage up to 1000 volts and can withstand impulse voltages of 8 kV. Weighing in at 26.68 poun
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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 available units in our catalog of 140G MCB.
140G-N0I3-E12-Z1
Operating at a rated insulation voltage of 1000 volts, this circuit breaker supports a current range of 1200 A. It also withstands impulse voltages up to 8 kV, boasting a weight of 21.39 lbs. Designed
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4.8
140G-NS5I4-E12
This model incorporates four poles and utilizes electronic LSIG protection. It is rated for a maximum insulation voltage of 1000 volts and can withstand impulse voltages up to 8 kV. Weighing 27.56 pou
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4.7
140G-H3C3-C60
This molded case circuit breaker is built upon an H frame and features fixed thermal and magnetic protection types. The current range it supports is set at 60 A while maintaining a rated insulation vo
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5.0
140G-H15I3-D12
This model features electronic LSIG protection and operates within a current range of 120 A. The device is rated for an insulation voltage of 1000 V, along with an impulse withstand voltage of 8 kV. W
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4.6
140G-H3C3-C32
This circuit breaker model features fixed thermal and magnetic protection mechanisms. It has a current range capable of handling 32 Amps. The rated insulation voltage stands at 1000 V, while the impul
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4.8
140G-HC6C3-C32
This model operates at a specified current range of 32 A and is built within an HC frame. It boasts an interrupting capacity of 65 kA. The perfect solution for high-performance environments, its insul
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4.8
140G-HC6C3-C40
This device features a fixed thermal and magnetic protection mechanism and operates at a current range of 40 A. It supports a rated insulation voltage of 1000V and withstands impulse voltages up to 8
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140G-G6C4-C90
Featuring a four-pole configuration, the 140G-G6C4-C90 operates within a current range of 90 A. It incorporates fixed thermal and magnetic protection, delivering dependable circuit management. Rated i
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140G-H0C3-C25
The Allen-Bradley 140G-H0C3-C25 is a part of the 140G MCB series, distinguished by its capability to handle an interrupting rating of 100 kA. This device offers thermal and magnetic protection with a
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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.