140G-J2H4-C40
The 140G-J2H4-C40 breaker supports 40 A of rated current and a maximum current rating of 250 A. The 140G-J2H4-C40 features a robust electronic LSI protection system. This circuit breaker's rated insul
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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-J3F4-D11
This circuit breaker operates with four poles and supports an adjustable protection scheme that includes both thermal and magnetic settings. Rated to handle voltages up to 1000V, it can withstand impu
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140G-J6F4-D11
This molded case circuit breaker operates within a current range of 110 A and is built with four poles. It boasts a rated insulation voltage of 1000V and can withstand impulse ratings of 8 kV. The uni
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140G-J6H4-C60
Designed with four poles, the 140G-J6H4-C60 operates within a current range of 60 Amps. It boasts a rated insulation voltage of 1000 volts, with an impulse withstand voltage rating of 8 kV. This circu
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140G-JTH4-D10
This molded case circuit breaker supports a current range of up to 100 A and operates at a rated insulation voltage of 1000 V. It is designed to withstand impulse voltages of 8 kV. Weighing 7.72 lbs,
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140G-K3I3-D40
This molded-case circuit breaker is rated for 400 Amps and operates with a maximum rated insulation voltage of 1000 volts. It features a K-frame design tailored for effective current management. The d
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140G-M0K3-D63
This device operates within a current range of up to 630 A and is designed for high voltage applications with a rated insulation voltage of 1000V. It incorporates Electronic LSIG protection and is cap
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140G-J2I3-D15
The 140G-J2I3-D15 features electronic LSIG protection and operates at a rated insulation voltage of 1000 volts. It can withstand impulse voltages up to 8 kV. This breaker weighs 5.51 pounds and is bui
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140G-H2C4-C60
With four poles, this molded case circuit breaker supports a current range of 60 A. Rated at 1000 V for insulation and with an impulse withstand voltage of 8 kV, its design ensures robustness and dura
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140G-H2I4-D12
This circuit breaker includes four poles and is rated for a current range up to 120 Amps. It operates at a rated insulation voltage of 1000 V and is constructed to withstand impulse voltages of 8 kV.
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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.