140G-H3I4-D10
This molded case circuit breaker features a robust H frame configuration. It has four poles and an extensive current handling capability of 100 A. Rated insulation voltage is set at 1000 V, alongside
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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-HTF4-D11
This circuit breaker operates with a current range of 110 A and features an insulation voltage rating of 1000 V. It can withstand impulse voltages of up to 8 kV. Weighing 3.53 pounds, its mechanical l
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4.9
140G-J2C3-C35
This circuit breaker operates with a current rating of 35 A and up to 250 A of maximum current. It also operates with an insulation voltage rating of up to 1000 V and can also withstand impulse voltag
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4.7
140G-J2H4-D25
This circuit breaker is designed with four poles and can handle a current rating of up to 250 A. It features a rated insulation voltage of 1000 volts and a rated impulse withstand voltage of 8 kV, ens
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4.5
140G-J3C3-C35
This circuit breaker has a size J frame and is engineered for 35 Amps of rated current. It is rated for up to 1000 volts of insulation voltage and withstands impulse voltages of up to 8 kV. It is buil
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4.6
140G-J3H4-C40
This unit is designated as a 4-pole circuit breaker that operates within a current range of 40 Amps. Rated for insulation voltages up to 1000 V, it can also withstand impulse voltages of 8 kV. The pro
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4.6
140G-J6C4-C63
Designed for robust performance, the 140G-J6C4-C63 model operates within a current range of up to 63 A. It provides fixed thermal and magnetic protection, ensuring effective circuit safety. With an in
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140G-J6I4-C40
Part number 140G-J6I4-C40 is designated as a four-pole molded case circuit breaker. It operates within a rated insulation voltage of 1000 volts and can withstand impulse voltages reaching up to 8 kV.
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140G-JC0C3-C35
Operating within a current range of 35 Amps, this device features fixed thermal and fixed magnetic protection. It also has a rated insulation voltage of 1000 volts and an impulse withstand rating of 8
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4.7
140G-JC6F3-C80
This device operates within a current range of 80 Amps and is constructed with an adjustable thermal and magnetic protection system. It has a rated insulation voltage of 1000 volts and is capable of w
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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.