140G-H3C4-C35
This circuit breaker includes four poles and operates effectively within a current range of 35 A. Its rated insulation voltage is 1000 V, while it can withstand impulse voltages up to 8 kV. Weighing 3
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4.9
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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-H6C3-C20
This molded case circuit breaker operates with a current range of 20 Amps. It is built on an H frame with an insulation voltage rating of 1000 V and withstands impulse voltages up to 8 kV. The unit ha
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4.7
140G-J2C3-C32
This circuit breaker utilizes fixed thermal and fixed magnetic protection options and operates within a current rating of 32 Amps. It also supports up to 250 Amps of current. With a rated insulation v
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5.0
140G-J2C4-C50
This circuit breaker comes with a type J frame, four poles, a current rating of 50 A, and a maximum current of 250 A. It is engineered for a rated insulation voltage of 1000 V and can withstand impuls
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5.0
140G-K15H4-D40
This circuit breaker supports a current range of 400 Amps and includes four poles. It has a rated insulation voltage of 1000 volts and withstands impulse voltages of up to 8 kV. Weighing 9.15 pounds,
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4.7
140G-G6C4-C30
This model features a robust 65 kA interrupting capacity and includes four poles, facilitating reliable operation across diverse applications. It has fixed thermal and magnetic protection, designed fo
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4.5
140G-G6C4-C32
This molded case circuit breaker features a G frame size and supports four poles. It operates with a current range of 32 Amps, and is equipped with fixed thermal and magnetic trip mechanisms. The rate
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4.4
140G-H0C4-C25
The molded case circuit breaker, 140G-H0C4-C25, operates with a fixed thermal and magnetic protection mechanism. It includes four poles and supports a current range of 25 Amps. With a rated insulation
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4.6
140G-H0I4-D10
This model operates effectively at a rated insulation voltage of 1000 V. Designed with four poles, it can accommodate a current range of 100 A. The breaker also withstands impulse voltages up to 8 kV,
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5.0
140G-H0I4-D12
This molded case circuit breaker operates on a 1000 V rated insulation voltage and can withstand impulse voltages up to 8 kV. The protection method utilized is electronic LSIG, with four poles availab
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4.9
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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.