140G-K0K3-D40
This circuit breaker operates with a design that supports a current capacity of 400 A and incorporates an insulation voltage rating of 1000 volts. Its rated impulse withstand voltage is 8 kV. Weighing
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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-KC6F3-D30
This molded case circuit breaker utilizes a KC frame design and operates efficiently with a rated current of 300 A. It can handle insulation voltage levels reaching up to 1000V and withstand impulse v
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140G-KTI4-D30
This four-pole circuit breaker handles a rated insulation voltage of 1000V and can withstand impulse voltages up to 8 kV. The 140G-KTI4-D30 weighs 9.15 pounds. It ensures efficient operation with a me
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140G-M0F4-D60
This circuit breaker operates with an M frame and provides adjustable thermal and magnetic protection. It features four poles and operates with a rated current of 600 amps. The breaker's insulation vo
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140G-M0I3-D60
Rated for 800 Amps, the 140G-M0I3-D60 breaker supports a current range of 600 A. The device has a frame type of M and handles insulation voltage levels up to 1000 V. Its rated impulse withstand voltag
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140G-M5I4-D80
The 140G-M5I4-D80 breaker's design includes an electronic LSIG protection mechanism and a four-pole configuration. This unit has a rated insulation voltage of 1000 volts and can withstand impulse volt
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140G-N0H4-E12-Z1
Designed with an N frame, this model operates within a current range of 1200 A and is rated for an insulation voltage of 1000 V. The equipment can tolerate impulse withstand voltages of up to 8 kV and
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140G-N6K4-E12
With a weight of 27.56 pounds, the 140G-N6K4-E12 is designed with an N frame size, allowing it to support a continuous current range of 1200 A. The unit has a rated insulation voltage of 1000 volts an
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140G-NS6K4-E12
This 4-pole circuit breaker operates with a frame size of NS, rated for a maximum current of 1200 A. It can handle insulation voltages up to 1000V and withstand impulse voltages of 8 kV. Weighing 27.5
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40G-JTF3-C80
This molded case circuit breaker is designed for current applications up to 80 Amps. It has an insulation voltage rating of 1000 volts and can withstand impulse voltages of 8 kV. The weight of the 40G
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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.