140G-JTF4-D17
This circuit breaker boasts four poles and offers a current range of 170 A. The frame type is categorized as J, with a rated insulation voltage of 1000 volts. It is designed to endure impulse voltages
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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-JTF4-D25
This molded case circuit breaker supports a current range of 250 A and includes a rated insulation voltage of 1000 V. The device is capable of withstanding impulse voltages up to 8 kV. Weighing 7.72 p
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140G-K0K3-D30
Designed with a K frame, the 140G-K0K3-D30 breaker features a rated current of 300 A and a maximum current of 400 A and supports a rated insulation voltage of 1000 volts. It is also rated for impulse
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140G-KTI3-D30
This circuit breaker operates within a current range of 300 Amps and is housed in a K frame type. It accommodates a rated insulation voltage of 1000V and can withstand impulse voltages of 8 kV. The un
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140G-M5I4-D60
This molded case circuit breaker operates within a current range up to 600 Amps. It supports a rated insulation voltage of 1000 volts, providing versatility for industrial applications. The device is
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140G-M5K3-D63
Designed for 630 A current range, the 140G-M5K3-D63 has a rated insulation voltage of 1000 volts. It can withstand impulse voltages of 8 kV, offering durability in electrical systems. Weighing 26.68 p
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140G-MTF4-D80
With a frame size categorized as M, this unit operates at a rated insulation voltage of 1000 volts. It has a four-pole configuration and can withstand impulse voltages up to 8 kV. The breaker weighs 3
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140G-MTI4-D80
With a robust capacity of 800 A, this product is engineered to protect essential electrical circuits. The circuit breaker features four poles, making it suitable for three-phase applications. Rated fo
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140G-N0K4-E12
Crafted for industrial environments, this four-pole circuit breaker incorporates electronic LSIG protection. It operates at a rated insulation voltage of 1000 V and withstands impulse voltages of up t
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140G-N5I3-E12-Z1
This circuit breaker operates within a rated insulation voltage of 1000 volts and can endure impulse withstand voltages reaching 8 kV. Departmentalized into the N frame classification, it weighs 21.39
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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.