140G-JC6C3-C70
This circuit breaker features a JC frame and has a maximum current range of 70 Amps. It operates effectively at a rated insulation voltage of 1000 volts and can withstand impulse voltages up to 8 kV.
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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 available units in our catalog of 140G MCB.
140G-JC6F3-C90
This unit operates with an adjustable thermal and magnetic protection type, maintaining versatility across applications. The product supports a current range of 90 A and is rated for insulation voltag
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140G-JC6H3-D10
This circuit breaker operates within a current range of up to 100 A. It is equipped with electronic LSI protection to enhance reliability. The device can handle insulation voltages up to 1000 V and wi
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140G-JC6H3-D15
This molded case circuit breaker features a JC frame and operates within a current range of 150 Amps. It has a rated insulation voltage of 1000 Volts and withstands impulse voltages up to 8 kV. Weighi
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140G-JTF4-D11
The 140G-JTF4-D11 is engineered to manage a current range of 110 A. Accommodating up to 1000 V for rated insulation, it has an impulse withstand voltage capability of 8 kV. Designed for durability, it
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140G-JTH3-C60
This circuit breaker model, part of the Allen-Bradley 140G series, features a JC frame and can handle up to 250 Amps. It has an interrupting rating that operates via a trip unit, ensuring overcurrent
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140G-JTI3-C60
This circuit breaker supports an insulation voltage of 1000 Volts and withstands impulse voltages of 8 kV. It features a J frame and weighs 5.51 pounds. The unit is designed for a mechanical life of 2
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140G-JTI4-C60
This molded case circuit breaker operates with four poles and supports a rated current of 60 amps. It is configured for a rated insulation voltage of 1000 volts and withstands impulse voltages of up t
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140G-K0X4
This circuit breaker operates at a maximum current of 400 amps and has a rated insulation voltage of 1000 volts. The design has a rated impulse withstand voltage of 8 kV. Weighing 9.15 pounds, this un
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140G-K3K3-D30
This circuit breaker device is designed with a K frame and supports operation with a rated current of 300 Amps and a maximum current of 400 Amps. It has an insulation rating of 1000 volts and can with
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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.