140G-G2C4-C60
The 140G-G2C4-C60 is a molded case circuit breaker featuring a G Frame. It operates at 125 amps and is designed with four poles. Its fixed thermal and magnetic protection types ensure reliable circuit
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4.9
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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-C32
This molded case circuit breaker features a G frame size and supports four poles. It operates with a current range of 32 Amps, and is equipped with fixed thermal and magnetic trip mechanisms. The rate
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4.4
140G-H0C4-C50
This model features a robust H frame design and is equipped with four poles. The unit operates within a current range of 50 Amps and is designed for insulation voltages rated at 1000 V. It also has an
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5.0
140G-H0F3-D16
The 140G-H0F3-D16 circuit breaker operates with an adjustable thermal and magnetic protection mechanism. It has been rated to manage currents up to 160 A. With insulation voltage capabilities reaching
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4.9
140G-H0F4-D11
This molded case circuit breaker provides an interrupting capability of 100 kA. It operates effectively with a rated insulation voltage of 1000 volts and can withstand impulse voltages up to 8 kV. The
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5.0
140G-H0F4-D12
This four-pole molded case circuit breaker operates with adjustable thermal and magnetic protection mechanisms. It supports a current range of up to 120 amps, while its rated insulation voltage is 100
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4.7
140G-H0I4-D10
This model operates effectively at a rated insulation voltage of 1000 V. Designed with four poles, it can accommodate a current range of 100 A. The breaker also withstands impulse voltages up to 8 kV,
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5.0
140G-H15F3-D11
As part of the 140G MCB series, the 140G-H15F3-D11 features adjustable thermal and magnetic protection for customizable circuit management. Rated for 125 amps, it is capable of handling a maximum curr
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4.7
140G-H15F3-D16
The 140G-H15F3-D16 offers a rated insulation voltage of 1000 V and can withstand impulse voltages up to 8 kV. It has a current range capacity of up to 160 A. The device is designed for a mechanical li
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5.0
140G-H15F4-D10
This molded case circuit breaker is designed with an H frame and features adjustable thermal and magnetic protection settings. With a current range of 100 amps, the breaker is built to support rated i
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4.6
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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.