140G-M6K4-D60
This circuit breaker is configured with four poles and features an electronic LSIG protection system. It can handle a current range up to 600 A and is rated for an insulation voltage of 1000 volts. Th
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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-G-EA1A
The circuit breaker is equipped with one normally open (NO) auxiliary contact and a contact configuration of one changeover (CO). It operates at a rated voltage of 250 V AC and is designed to function
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5.0
140G-KC0H3-D40
This breaker model features a KC frame and operates effectively within a current range of 400 amps. It is rated for an insulation voltage of 1000 volts and can withstand impulse voltages of 8 kV. Weig
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4.8
140G-G-EA1AU
Featuring a contact configuration of 1 normally open (NO) and 1 normally closed (NC), this breaker includes one auxiliary contact. It has a wire length of 1 meter and withstands operating temperatures
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5.0
140G-G6C3-C60-KA
This 3-pole circuit breaker features a thermal trip rating of 60 A and a magnetic trip current of 600 A. It has a maximum breaking capacity of 65 kA and is rated for a voltage of 690 V AC. The unit mo
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5.0
140G-JC0I3-D25
Featuring a JC frame, the 140G-JC0I3-D25 breaker operates with electronic LSIG protection and is suited for current ranging up to 250 A. Rated for 1000 volts of insulation, it can handle impulse withs
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4.7
140G-K6K4-D30
This molded case circuit breaker is equipped with electronic LSIG and MM protection. It operates with four poles and a rated current of 300 A. It supports a rated insulation voltage of 1000 volts and
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5.0
140G-NS5H3-E12
This breaker is designed with an NS frame and offers a current range of 1200 A. It has a rated insulation voltage of 1000 volts. The impulse withstand voltage is rated at 8 kV, making it suitable for
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4.9
140G-G-TC3L
This circuit breaker operates effectively in a temperature range from 0 to 40 °C. It supports a maximum operating humidity of 80% and maintains the same level for storage conditions. Designed with an
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5.0
140G-H-FMX06
Featuring a flexible cable size of 6 ft, the 140G-H-FMX06 circuit breaker has an interrupting capacity of 10 kA and insulation rated up to 1000 V. The device is housed in an enclosure rated NEMA Type
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4.5
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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.