140G-G3C4-D12
This molded case circuit breaker features four poles and is equipped with both fixed thermal and fixed magnetic protection mechanisms. It provides a significant interrupting capacity of 35 kA, with a
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4.5
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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-G6C4-C50
This model is equipped with both fixed thermal and magnetic protections, with a thermal trip set at 50 amps and magnetic trip at 500 amps. Operating with a rated insulation voltage of 800 volts and an
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4.7
140G-G6C4-D10
The 140G-G6C4-D10 model is part of the Allen-Bradley 140G series of molded case circuit breakers, featuring a fixed thermal and fixed magnetic protection mechanism. It provides a current range rated a
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4.9
140G-H0C4-C63
This molded case circuit breaker, designated 140G-H0C4-C63, features an H frame structure. It is capable of handling a continuous current of 125 Amps with a notable interrupting capacity of 100 kA. De
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5.0
140G-H15C3-C16
This molded case circuit breaker is designed for high performance with a rated current of 125 amps and an interrupting capacity of 150 kA. It features fixed thermal and magnetic trip mechanisms and op
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5.0
140G-H15C4-C30
The 140G-H15C4-C30 circuit breaker includes four poles and operates within a current range of 30 Amps. It offers a rated insulation voltage of 1000 V and can withstand impulse voltages up to 8 kV. Add
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4.7
140G-G3C4-C70
The 140G-G3C4-C70 circuit breaker is characterized by its 4-pole design and fixed thermal and magnetic protection types. It effectively manages a maximum current range of 70 Amps, with a thermal trip
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4.7
140G-H0I3-D16
This circuit breaker operates with a rated current range up to 160 A and provides an insulation voltage rating of 1000 volts. It withstands impulse voltages of up to 8 kV. Weighing in at 2.65 lb, it o
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4.7
140G-H15C4-C50
This breaker is designed with a 4-pole configuration and supports a current range of 50 A. Its fixed thermal and fixed magnetic protection types ensure reliability. The unit features a rated insulatio
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4.7
140G-HC6C3-C30
This circuit breaker features a fixed thermal and magnetic protection type and operates efficiently in a current range of up to 30 A. It has a rated insulation voltage of 1000 V and can withstand impu
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4.9
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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.