140G-JTI3-D10
The 140G-JTI3-D10 design includes a robust electronic LSIG protection feature. It operates with a rated current of 100 Amps while maintaining an electrical life rating of 120 operations per hour. This
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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-K15I3-D40
This circuit breaker employs an electronic LSIG protection mechanism and has a frame size of K. It supports a rated insulation voltage of 1000V and can withstand impulse voltages of up to 8 kV. The un
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140G-K15X3
This circuit breaker operates with a rated insulation voltage of 1000 Volts and withstands impulse voltages of up to 8 kV. The unit has a weight of 7.17 pounds and features a mechanical life rating of
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140G-K3K3-D40
Designed as a frame K circuit breaker, this unit accommodates a current range of up to 400 A and supports a rated insulation voltage of 1000 V. It features impulse withstand capabilities up to 8 kV. W
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140G-K3X4
This molded-case circuit breaker has four poles and supports a rated insulation voltage of 1000 volts. The impulse withstand voltage is rated at 8 kV. At 9.15 pounds, this breaker has a mechanical lif
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140G-M0I4-D63
Configured with four poles and utilizing an M frame, the 140G-M0I4-D63 manages a current range of 630 Amps. It supports a rated insulation voltage of 1000 Volts and can withstand impulse voltage level
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140G-M0K3-D60
This device includes an M-frame design and operates effectively within a current range up to 600 Amps. It has a rated insulation voltage of 1000 volts along with a withstand voltage of 8 kV. Weighing
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140G-M5F4-D63
This molded case circuit breaker utilizes a frame size designated as M and accommodates a current range of up to 630 Amps. It includes four poles and adjustable thermal and magnetic protection setting
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140G-M6I3-D60
This molded case circuit breaker features a frame size of M and operates within a current range of 600 A. It is rated for insulation voltages of up to 1000 volts and can withstand impulse voltages of
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140G-MTH4-D80
This unit operates at a maximum current range of 800 A and comes with an interrupting rating governed by the trip unit. Capable of functioning under an insulation voltage of 1000 Volts, it withstands
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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.