140G-J3C3-C32
This circuit breaker operates within a J frame and includes fixed thermal and fixed magnetic protection technology. It manages 32 A of rated current and 250 A of maximum current. It is rated for 1000V
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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-J3F4-D12
This model is designed with four poles and can manage a current range of up to 120 A. It operates efficiently at a rated insulation voltage of 1000 V and supports impulse withstand voltage of 8 kV. It
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140G-J3I4-D10
This circuit breaker is configured with four poles and utilizes electronic LSIG protection. It operates within a current range of up to 100 Amps, suitable for various applications. The module supports
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4.7
140G-JC0F3-D25
The 140G-JC0F3-D25 circuit breaker supports a current capacity of 250 A with an insulation voltage rated at 1000V. It can withstand impulse voltages of up to 8 kV. Weighing 5.51 pounds, the device ope
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140G-JC0I3-D10
This circuit breaker belongs to the JC frame design. It maintains an impressive rated insulation voltage of 1000 volts and can withstand impulse voltages of up to 8 kV. Weighing in at 5.51 pounds, it
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140G-JC6C3-C32
This breaker is configured within a current range of 32 Amps and features fixed thermal and magnetic protection types. It is rated for an insulation voltage of 1000 volts and withstands impulse voltag
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140G-JTF4-D10
This molded case circuit breaker offers a configuration with four poles. It operates within a current range of up to 100 Amps. The unit withstands rated impulse voltages of 8 kV, providing robust prot
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140G-K15H4-D30
This molded-case circuit breaker, built with a K frame, has a rated current of 300 A and a maximum current of 400 A. It operates efficiently at an insulation voltage of 1000 volts and can withstand im
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140G-K3I3-D30
This circuit breaker device operates at a rated current of 300 A and is housed in a K frame. The insulation voltage is rated at 1000V, and this breaker can withstand impulse voltage levels of up to 8
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140G-K6F4-D30
This circuit breaker device offers adjustable thermal and magnetic protection technology, ensuring adaptability to various conditions. It has four poles and operates with 300 A of rated current and 40
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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.