140G-N6I4-E12-Z1
This circuit breaker has four poles and utilizes an electronic LSIG protection system. It maintains a rated insulation voltage of up to 1000 volts and is rated for impulse voltages of 8 kV. Weighing 2
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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-NS0I4-E12
This circuit breaker accommodates a maximum current range of 1200 A. It operates at a rated insulation voltage of 1000 volts and can withstand impulse voltages of up to 8 kV. Weighing 27.56 pounds, it
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140G-NS6I4-E12
The 140G-NS6I4-E12 is equipped with four poles and operates within a current range of 1200 A. It maintains a rated insulation voltage of 1000 volts and can withstand impulse voltages of up to 8 kV. Th
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140G-R12I3-E25
This versatile circuit breaker operates within a frame size designated as R and accommodates a current range of 2500 A. It supports a rated insulation voltage of 1000 volts, making it suitable for hig
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140G-R12I4-E20-Z1
This four-pole circuit breaker operates within a current range of 2000 A and is rated for insulation voltages of 1000 volts. It can withstand impulse voltages up to 12 kV. With a weight of 175 pounds,
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140G-HC6C3-C70
This circuit breaker is designed with a current range of up to 70 A and features fixed thermal and magnetic protection mechanisms. It operates effectively at a rated insulation voltage of 1000 volts a
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140G-HTH3-C60
Part number 140G-HTH3-C60 features a current range of 60 Amps and operates with a rated insulation voltage of 1000 volts. This unit withstands impulse voltages of up to 8 kV. Weighing 2.65 pounds, it
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140G-I3C3-C80
This circuit breaker features a frame size I and an interrupting rating of 35 kA. It supports a fixed thermal trip setting at 80 A, while the magnetic trip can handle up to 800 A. Its insulation volta
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140G-I3C4-D12
Operating with a current range of 120 A, this circuit breaker supports four poles. Its rated insulation voltage is 800V and it can withstand impulse voltages up to 8 kV. Weighing 5.73 pounds, the mode
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140G-J2C4-C70
This four-pole circuit breaker supports a current rating of 70 A and a maximum current of 250 A. It is rated for an insulation voltage of 1000 V, and its impulse withstand voltage rating is 8 kV. It i
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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.