140G-K15I4-D40
As part of the K frame series, the 140G-K15I4-D40 utilizes electronic LSIG protection and includes four poles. The device operates with a rated insulation voltage of 1000 volts and withstands impulse
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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-M6F4-D63
This device is built with a frame size of M and has four poles. It is designed to handle a current range of 630 Amps. Its rated insulation voltage is 1000 Volts, and it withstands impulse voltages up
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140G-N0I4-E12-Z1
This circuit breaker features an N frame type and operates within a current range of 1200 A. It uses electronic LSIG protection and has a rated insulation voltage of 1000 V. The device withstands impu
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140G-NS5H4-E12
This model operates within a current range of 1200 A and is equipped with four poles. It is rated for insulation voltage of 1000V and can handle impulse withstand voltages up to 8 kV. The device weigh
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140G-NS5I3-E12
With an NS frame, this circuit breaker operates effectively within a current range of 1200 A. It is rated for an insulation voltage of 1000 V and can withstand impulse voltages of up to 8 kV. The devi
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140G-H3F3-D16
The 140G-H3F3-D16 features an adjustable thermal and magnetic protection mechanism. It accommodates a current range of 160 A and is housed within a sturdy H frame. This circuit breaker withstands rate
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140G-H3C4-C16
This circuit breaker features a four-pole design, enabling effective electrical management. It operates within a current range of 16 A and is rated for insulation up to 1000 V, ensuring compatibility
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140G-H3F4-C90
Engineered for efficiency, the 140G-H3F4-C90 circuit breaker operates within a current range of 90 A. It employs adjustable thermal and magnetic protection mechanisms for customized operation. This de
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140G-H3I3-D12
The 140G-H3I3-D12 circuit breaker is designed with a frame type H and supports a current range of 120 A. It operates at a rated insulation voltage of 1000 V and is capable of withstanding impulse volt
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140G-H3I3-D16
Operating with a current capacity of 160 A, the 140G-H3I3-D16 ensures effective circuit protection. It has a rated insulation voltage of 1000 V and can withstand impulse voltages up to 8 kV. The unit
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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.