140G-H0C3-C50
This molded case circuit breaker is designed with an H frame and operates across a current range starting at 50 A. Its protection mechanisms include fixed thermal and fixed magnetic options. It mainta
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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-H0F4-D10
Designed with an H frame, the 140G-H0F4-D10 includes four poles and adjusts for both thermal and magnetic protection. It is rated for a maximum current range of 100 A. Additional specifications includ
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140G-H15F3-C80
The 140G-H15F3-C80 model features adjustable thermal and magnetic protection types, with a current range capable of handling up to 80 Amps. It supports a rated insulation voltage of 1000 volts and an
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140G-H15H4-C60
Designed for high-performance applications, the 140G-H15H4-C60 circuit breaker operates at a maximum current of 125 Amps. It employs Electronic LSI for its protection type and includes four poles. Thi
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140G-H3C3-C35
Incorporating fixed thermal and magnetic protection types, this model operates effectively within a current range of up to 35 A. It features a rated insulation voltage of 1000 V and an impulse withsta
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140G-J0H4-D25
This circuit breaker supports four poles and has a J frame. It utilizes electronic LSI protection and ensures effective current management within a range of 250 A. The rated insulation voltage is 1000
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140G-J6H3-C60
This model features an electronic LSI protection type and operates with a current range of 60 Amps. It supports a rated insulation voltage of 1000V and can withstand impulse voltages up to 8 kV. The p
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140G-J6H3-D15
This circuit breaker boasts a current handling capacity of 150 A, ensuring versatile applications. It features a rated insulation voltage of 1000 V and can withstand impulse voltages of up to 8 kV, ma
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140G-J0F3-D25
This circuit breaker is classified under the J-frame and features adjustable thermal and magnetic protections. It operates within a current range of 250 A and is rated for an insulation voltage of 100
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140G-G2C4-C80
The 140G-G2C4-C80 is a molded case circuit breaker featuring a G frame designed by Rockwell Automation under the Allen-Bradley brand. It provides fixed thermal and magnetic protection and operates at
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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.