140G-H2C4-C63
This circuit breaker is structured on the H-frame design, accommodating a current range of 63 amps. It consists of four poles and offers robust insulation with a rated voltage of 1000 V. Additionally,
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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-H2F4-D10
Designed with an H frame, the 140G-H2F4-D10 accommodates up to four poles. It handles current within a range of 100 A and has insulation voltage ratings reaching 1000 V. Its rated impulse withstand vo
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140G-H3C3-C25
This model features a frame classification of H and supports a current range of 25 A. The unit provides an interrupting capacity of 35 kA, ensuring effective circuit protection. Rated for insulation u
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140G-H3C4-C50
This model features four poles and includes fixed thermal and magnetic protection mechanisms. It can handle currents up to 50 A, with a rated insulation voltage of 1000 volts and an impulse withstand
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140G-H3H4-C25
This specific circuit breaker integrates four poles and utilizes electronic LSI protection. It manages a current range of 25 amps, with a rated insulation voltage of 1000 volts and withstands impulse
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140G-HC0H3-D12
Equipped with electronic LSI protection, the 140G-HC0H3-D12 supports a current range of up to 120 A. It maintains a rated insulation voltage of 1000 V and can withstand impulse voltages up to 8 kV. We
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140G-J3C3-C70
This breaker model features a J-frame construction and fixed thermal and magnetic protection mechanisms. Its rated current is 70 A, and it operates efficiently at a rated insulation voltage of 1000 V.
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140G-JTI4-D10
This breaker operates with a maximum current capacity of 250 Amps and incorporates a trip unit for effective fault interruption. It supports an insulation voltage rating of 1000 volts and can withstan
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140G-K15I4-D30
This 4-pole circuit breaker is designed to operate with a rated current of 300 A. It features electronic LSIG protection and is rated for an insulation voltage of 1000 volts. It can handle impulse wit
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140G-M0I3-D63
This circuit breaker provides electronic LSIG protection and supports a current range of up to 630 A. It is rated for insulation voltage up to 1000 V and can withstand impulse voltage of 8 kV. Weighin
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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.