140G-HC6I3-D12
Designed with a frame type HC, this circuit breaker employs electronic LSIG protection. It has a current range up to 120 A and a rated insulation voltage of 1000 V. The impulse withstand voltage is ra
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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-J0C4-C50
This four-pole circuit breaker operates within a current range of 50 amps and incorporates fixed thermal and magnetic protection mechanisms. It supports a rated insulation voltage of 1000 volts and wi
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140G-J0F4-D12
Designed with an amp rating of 250, the 140G-J0F4-D12 handles a current range of up to 120 A. It has a rated insulation voltage of 1000 volts and a withstand voltage rating of 8 kV. The device weighs
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140G-J0F4-D15
This circuit breaker comprises four poles and has a current range of 150 A. Rated for insulation up to 1000V and impulse withstand voltage of 8 kV, it is built for reliability in challenging condition
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140G-J0I3-D10
The 140G-J0I3-D10 circuit breaker is built with a J frame design and operates with a rated current of up to 100 A. Its rated insulation voltage is 1000 V, with an impressive impulse withstand voltage
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140G-J0I4-C60
The 140G-J0I4-C60 circuit breaker has four poles and operates with a rated current of up to 60 A. It can support insulation voltage levels of up to 1000 V and impulse withstand voltages of up to 8 kV.
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140G-J2F4-D12
This molded case circuit breaker operates with a standard current rating of 120 A and is configured with four poles. It employs adjustable thermal and magnetic protection technology to ensure reliable
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140G-J2I3-D10
The 140G-J2I3-D10 circuit breaker showcases a rated insulation voltage of 1000 V and can withstand impulse voltages up to 8 kV. It weighs 5.51 pounds, and it has a mechanical life of 240 operations pe
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140G-J2I4-C40
Constructed with a J frame, the 140G-J2I4-C40 operates with a rated current of 40 A and has a rated insulation voltage of 1000 V. It can withstand impulse voltages of up to 8 kV. This circuit breaker
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140G-J3C4-C70
This circuit breaker is designed with fixed thermal and magnetic protection mechanisms. It operates with 70 A of rated current and 250 A of maximum current and is rated for an interrupting capacity of
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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.