140G-J0C4-C60
This model is equipped with 4 poles and is capable of interrupting currents at a staggering 100 kA level. Designed for a current range of 60 A, it provides reliable protection against faults. The rate
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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-J0F3-C80
With a frame size designated as J, this circuit breaker operates within an adjustable current range of 80 Amps. It supports a rated insulation voltage of 1000 volts and can endure impulse withstand vo
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4.9
140G-J0I4-C40
This molded case circuit breaker features electronic LSIG protection and is equipped with four poles. It has a rated current value of 40 A and sustains a rated insulation voltage of 1000 V and an impu
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4.9
140G-J0I4-D10
This modeled case circuit breaker offers a rated current of 100 A, an additional current rating of 250 A, and four poles for versatility in electrical configurations. It supports a rated insulation vo
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5.0
140G-J2C4-C60
This circuit breaker unit features four poles, a rated current of 60 A, and a maximum current of 250 A. The breaker's rated insulation voltage is 1000 Volts, and it can withstand impulse voltages of u
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140G-J2H3-C40
The 140G-J2H3-C40 is designed with advanced features including an electronic LSI protection option. It supports a current rating of 40 A and insulation voltage ratings of 1000 volts. The device also w
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140G-J2X4
This breaker model features a four-pole configuration and operates with a rated insulation voltage of 1000 volts. It withstands impulse voltages of up to 8 kV. The 140G-J2X4 breaker has a mechanical l
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4.8
140G-J3C4-C35
This circuit breaker features four poles and operates with a rated current of 35 Amps and 250 Amps of maximum current. It employs fixed thermal and magnetic protection mechanisms. The breaker's insula
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5.0
140G-J3F4-C90
Equipped with a J frame type, this circuit breaker features four poles. It operates at a rated insulation voltage of 1000V and withstands impulse voltages of up to 8 kV. Weighing 7.72 lbs, it has a me
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5.0
140G-J3F4-D16
This circuit breaker features 4 poles and offers adjustable thermal and magnetic protection. It supports a current range of 160 A, with a rated insulation voltage of 1000 volts. Additionally, it withs
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4.4
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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.