140G-MTI4-D60
This circuit breaker operates with four poles and supports current levels of up to 600 Amps. It has a rated insulation voltage of 1000 volts and withstands impulse voltages up to 8 kV. With a mechanic
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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-H2I3-D10
This circuit breaker supports a current range of 100 A and is rated for an insulation voltage of 1000 V. The 140G-H2I3-D10 is capable of withstanding impulse voltages up to 8 kV. This unit weighs 2.65
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5.0
140G-J0C3-C70
With a frame categorized as J, this circuit breaker manages an adjustable current range limited to 70 A. It can operate at a rated insulation voltage of 1000 V and withstand impulse levels up to 8 kV.
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4.7
140G-JC6X3
This breaker operates with a rated insulation voltage of 1000 Volts and an impulse withstand voltage of 8 kV. The mechanical lifespan of the 140G-JC6X3 is 240 operations per hour, while the electrical
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4.6
140G-H15H4-D10
This circuit breaker features an H-frame designation and includes four poles. It employs electronic LSI protection technology, enhancing reliability during operation. With a 100 Amp current range and
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4.9
140G-H15I4-C60
This circuit breaker features an H frame and operates within a current range of 60 A. The rated insulation voltage is set at 1000 V, while the rated impulse withstand voltage reaches up to 8 kV. Weigh
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4.7
140G-H2C3-C16
Part number 140G-H2C3-C16 provides fixed thermal and magnetic protection. It supports a current range of 16 A while its frame is identified as H. The rated insulation voltage is 1000 V, and it can wit
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4.8
140G-H2C4-C32
Fitting into the H frame category, the 140G-H2C4-C32 operates with a current range of up to 32 A. It features four poles and fixed thermal and magnetic protection methods. This unit maintains insulati
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4.4
140G-H2H3-D10
The 140G-H2H3-D10 functions within a range of 100 Amps and uses electronic LSI protection for reliable operation. This circuit breaker has a rated insulation voltage of 1000 V and can withstand impuls
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4.9
140G-H2I3-D16
This circuit breaker features an H-frame design with a current range of 160 A. It is rated for insulation voltages of 1000 V and can withstand impulse voltages of 8 kV. The operational specifications
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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.