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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4.6
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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-J6F3-D16
This molded case circuit breaker features a J frame design and incorporates an interrupting rating of 65 kA. It operates effectively within a current range of 160 A and is rated for a maximum insulati
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4.6
140G-J6H3-D10
Operating at a maximum current range of 100 A, the 140G-J6H3-D10 features a rated insulation voltage of 1000 V. The rated impulse withstand voltage stands at 8 kV, ensuring reliability during voltage
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5.0
140G-G2E4-D16
The 140G-G2E4-D16 is a molded case circuit breaker designed with a G frame and supports 125 amps. Its interrupting rating is set at 25 kA, while it contains four poles to effectively manage current. T
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4.7
140G-G6C4-C15
This four-pole circuit breaker includes fixed thermal and magnetic trip protections. With a current range starting from 15 A, it features thermal and magnetic trips set at 15 A and 500 A, respectively
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140G-G6E4-D16
In the 140G series, the 140G-G6E4-D16 is defined as a molded case circuit breaker with adjustable thermal protection and fixed magnetic tripping. This unit supports four poles and can handle a current
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4.7
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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4.9
140G-H15C3-C32
Designed with an H frame, this circuit breaker operates with a fixed thermal and fixed magnetic protection mechanism. It handles a current range of 32 A and has a rated insulation voltage of up to 100
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5.0
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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4.4
140G-J0F3-D15
This breaker provides adjustable thermal and magnetic protection, accommodating a current range of 150 A. It supports rated insulation up to 1000 volts and impulse withstand voltage up to 8 kV. Weighi
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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.