140G-N5I3-E12
Designed for efficient protection, this circuit breaker operates at a rated insulation voltage of 1000 volts and can withstand impulse voltages of up to 8 kV. It has a weight of 21.39 pounds and mecha
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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-NS6H3-E12
Operating with a frame type of NS, the 140G-NS6H3-E12 breaker effectively supports a current range of up to 1200 A. It is rated for insulation voltages of 1000 volts and withstands impulse voltages of
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140G-H2C3-C32
The 140G-H2C3-C32 series represents a molded case circuit breaker equipped with fixed thermal and magnetic protection type. It can accommodate a current range of 32 Amps and is rated for an insulation
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4.8
140G-H15H3-D12
As a molded case circuit breaker, the 140G-H15H3-D12 falls within the H frame category. It supports a continuous current range of up to 120 amperes and operates with an insulation voltage rating of 10
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4.8
140G-HC0F3-C90
This device offers adjustable thermal and magnetic protection and operates within a current range of 90 A. It is rated for insulation voltage and impulse withstand voltage of 1000 V and 8 kV, respecti
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140G-J0F3-D11
This circuit breaker operates effectively within a current range of 110 A. It offers adjustable thermal and magnetic protection types, with a rated insulation voltage of 1000 V. The impulse withstand
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5.0
140G-J0F4-C90
This circuit breaker features an adjustable thermal and magnetic protection type, maximizing its adaptability for various electrical environments. With four poles and a current range of 90 A, it is su
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140G-JC0F3-D16
This circuit breaker operates with an insulation voltage of up to 1000 volts. It includes 160 A in its current range, and it is housed in a JC frame. The unit weighs 5.51 pounds and has a mechanical l
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4.7
140G-JC6H3-C40
This model includes a JC frame type and supports a current range of 40 Amps. With a rated insulation voltage of 1000 volts and withstand voltage up to 8 kV, it is capable of handling various types of
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4.6
140G-JTF4-D22
This circuit breaker utilizes a four-pole configuration and maintains a current range of 220 Amps. It has an insulation voltage rating of 1000 volts and can withstand impulse voltages of 8 kV. The uni
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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.