140G-HTF4-C80
This product is classified as a four-pole circuit breaker and operates effectively within an adjustable current range of 80 A. It offers rated insulation up to 1000 volts and can withstand impulse vol
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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-HTF4-C90
This unit is designed with a 4-pole configuration and offers a current range of up to 90 A. It supports a rated insulation voltage of 1000 V and features an impressive impulse withstand voltage of 8 k
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140G-HTF4-D10
This molded case circuit breaker operates across a current range of 100 amperes and is equipped with a trip unit for its interrupting rating. Rated insulation voltage reaches 1000 volts and impulse wi
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140G-HTH4-D12
This model features four poles, supporting a current range of up to 120 A. It operates safely at a rated insulation voltage of 1000 V and offers a rated impulse withstand voltage of 8 kV. Weighing 3.5
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140G-I2C4-C60
This circuit breaker is designed with a four-pole configuration and operates within a current range of 60 A. It can handle a rated insulation voltage of 800 volts and withstand impulse voltages of 8 k
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140G-I2C4-D22
This circuit breaker features a four-pole configuration and includes both fixed thermal and magnetic protection types. It is rated for insulation voltage up to 800 volts and can withstand impulse volt
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140G-I3C4-C90
This breaker features a fixed thermal and fixed magnetic protection type. It incorporates four poles and supports a maximum current range of 90 Amps. The rated insulation voltage for this unit is 800
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140G-J0C3-C32
This model operates with a frame designation of J and provides fixed thermal and magnetic protection. It can handle a current range of 32 amps, with a rated insulation voltage of 1000 volts and an imp
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140G-J0C4-C40
This circuit breaker features four poles and offers effective electrical protection utilizing both fixed thermal and magnetic trip mechanisms. With a current range of 40 amperes, it is compatible with
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140G-J0F3-D22
This circuit breaker, belonging to the J frame size, features adjustable thermal and magnetic protection mechanisms. It operates effectively within a current range of 220 A and has a rated insulation
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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.