140G-JTC3-C32
This circuit breaker, part of the 140G series, features a JC frame and supports a current range of 32 A. It can handle rated insulation voltages of 1000 volts and withstand impulse voltages of 8 kV. T
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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-JTI4-D15
With a 4-pole configuration, this breaker model offers advanced overload protection through its trip unit. It operates efficiently at a rated insulation voltage of 1000 volts and withstands impulse vo
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140G-K0F4-D40
This four-pole circuit breaker features adjustable thermal and magnetic protection technology. It operates with a current capacity of 400 A, has a rated insulation voltage of 1000 volts, and withstand
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140G-K15K4-D30
This 4-pole molded-case circuit breaker features a type K frame and operates with 300 A of rated current. It supports rated insulation voltages of 1000 V and withstands impulse voltages up to 8 kV. We
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140G-K6I3-D30
This molded-case circuit breaker features a K frame and employs electronic LSIG protection. It operates efficiently with 300 A of rated current and has a rated insulation voltage of 1000 volts, ensuri
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140G-M0K4-D63
Part of the M frame series, this circuit breaker incorporates electronic LSIG protection and operates with four poles. It is rated for a current range of 630 A and supports an insulation voltage of 10
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140G-M0K4-D80
This device is designed with a frame type M and includes four poles, accommodating also a current range of 800 amperes. It maintains a rated insulation voltage of 1000V and is engineered to endure a r
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140G-M6F3-D63
Operating with a frame designation of M, this circuit breaker supports a current range of up to 630 Amps. It is rated for an insulation voltage of 1000 volts and can withstand impulse voltages of 8 kV
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140G-M6H4-D80
This 4-pole circuit breaker falls under the Molded Case Breaker category. It operates within a current range of 800 A and boasts an insulation voltage rating of 1000 volts. Additionally, it can withst
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140G-M6X4
This model features a frame size of M with four poles. Designed for a rated insulation voltage of 1000 volts, it has an impulse withstand voltage rating of 8 kV. The device weighs 33.29 pounds and boa
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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.