140G-H2I4-D10
This circuit breaker operates with a four-pole design and features electronic LSIG protection. The maximum interrupting capacity is rated at 25 kA, suitable for high-fault scenarios. The device can ma
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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-H3H3-D16
This circuit breaker operates within a frame classified as H, supporting a current range of 160 A. It features an insulation voltage capacity of up to 1000 V and can withstand impulse voltages rated a
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140G-H6C3-C20
This molded case circuit breaker operates with a current range of 20 Amps. It is built on an H frame with an insulation voltage rating of 1000 V and withstands impulse voltages up to 8 kV. The unit ha
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140G-H6F3-D16
This circuit breaker is classified under the H frame type and supports a current rating of 160 Amps. It provides thermal and magnetic adjustments for protection. Operating with a rated insulation volt
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4.9
140G-I2C3-C80
This circuit breaker operates with a rated insulation voltage of 800 volts and can withstand impulses of up to 8 kV. It supports a current range of 80 A and has thermal and magnetic trip ratings of 80
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140G-J3F3-D12
This device is part of the J-frame series and operates efficiently within a current range of 120 A. It has a rated insulation voltage of 1000 volts and can handle impulse withstand voltages of 8 kV. W
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140G-J3H3-D10
This model of circuit breaker provides an interrupting rating of 35 kA and supports a current range of up to 100 A. The rated insulation and impulse withstand voltages are 1000 V and 8 kV respectively
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140G-J3H4-D25
This molded case circuit breaker supports a maximum current range of 250 Amps. It operates effectively at a rated insulation voltage of 1000 volts and has a rated impulse withstand voltage of 8 kV. Th
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140G-JC0F3-D11
This circuit breaker operates within a current range of up to 110 A and features adjustable thermal and magnetic protection types. Rated for 1000 volts, it is equipped to withstand impulse voltages of
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140G-JTH3-C40
This circuit breaker utilizes a JC frame and has an interrupting rating associated with its trip unit. It supports a rated insulation voltage of 1000 volts and can withstand impulse voltages up to 8 k
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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.