140G-N0K3-E12
This model is built under the N-frame designation, supporting electronic LSIG protection. It features a rated insulation voltage of 1000 volts and can withstand impulse voltages of up to 8 kV. The wei
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4.4
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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-N5I4-E12
This molded case circuit breaker comes with an N frame and operates effectively at a rated insulation voltage of 1000 V. It supports impulse withstand voltage ratings of up to 8 kV. Weighing 27.56 pou
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4.7
140G-NS0I3-E12
Operating within a current range of 1200 Amps, this NS frame breaker features electronic LSIG protection and is built for high-performance applications. It has a rated insulation voltage of 1000 volts
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140G-NS0K3-E12
This model includes electronic LSIG protection and operates efficiently at a rated insulation voltage of 1000 V. It has a full current range of 1200 A and withstands impulse voltages up to 8 kV. Weigh
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4.9
140G-NS5K3-E12
This molded case circuit breaker operates with a current rating of 1200 A and has an NS frame size. It is designed to handle a rated insulation voltage of 1000 volts and withstands impulse voltages of
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4.9
140G-NS6K3-E12
Featuring a constructed frame type NS, this circuit breaker is capable of handling currents up to 1200 A. It operates at a rated insulation voltage of 1000 volts and can withstand impulse voltage surg
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4.9
140G-R12I3-E25-Z1
This model features an R frame and is capable of managing currents between 2500 A and 3000 A. With a rated insulation voltage of 1000 volts and an impulse withstand voltage of 12 kV, it is built for h
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5.0
140G-R12I4-E20
This circuit breaker is rated for a current range of 2000 Amps and established with four poles. It has a rated insulation voltage of 1000 volts and can handle impulse withstand voltage up to 12 kV. We
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140G-R12I4-E30-Z1
Operating within a current range of up to 3000 A, this circuit breaker ensures safe disruption of power under fault conditions. It has a rated insulation voltage of 1000 volts and an impulse withstand
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4.9
140G-H15X4
This circuit breaker incorporates four poles and is constructed specifically for protection with a breaker frame type. It operates under an insulation voltage rating of 1000 V and withstands impulse v
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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.