140G-KTF4-D30
The 140G-KTF4-D30 circuit breaker is equipped with four poles and is built to accommodate a rated current of 300 amps. It has a rated insulation voltage of 1000 V and a rated impulse withstand voltage
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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-G3C4-C80
The molded case circuit breaker 140G-G3C4-C80 features a 4-pole configuration and supports current levels of up to 80 amps. This model boasts fixed thermal and magnetic protection, with a rated insula
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5.0
140G-J0H4-D25
This circuit breaker supports four poles and has a J frame. It utilizes electronic LSI protection and ensures effective current management within a range of 250 A. The rated insulation voltage is 1000
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4.4
140G-J6H3-C60
This model features an electronic LSI protection type and operates with a current range of 60 Amps. It supports a rated insulation voltage of 1000V and can withstand impulse voltages up to 8 kV. The p
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4.6
140G-JTF3-D25
This molded case circuit breaker features a JC frame type. The 140G-JTF3-D25 operates within a current range of 250 Amps. It supports a rated insulation voltage of 1000 V and is capable of withstandin
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4.6
140G-H6H3-C25
This unit has a current range of 25 A and utilizes electronic LSI protection. It is rated for insulation up to 1000 V and can withstand impulse voltages of 8 kV. Weighing 2.65 pounds, the device has a
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4.9
140G-HC0C3-C20
This device offers a current range of 20 A and a rated insulation voltage of 1000 V, optimizing its performance in numerous applications. Additional features include a rated impulse withstand voltage
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4.4
140G-G3C3-C16
The 140G-G3C3-C16 from Allen-Bradley is a molded case circuit breaker featuring a G frame structure. Rated for current capacities up to 125 amps, it includes fixed thermal and magnetic protection type
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4.7
140G-G3C4-C90
This unit features four poles and incorporates fixed thermal and magnetic protection systems. The 140G-G3C4-C90 has a current range of 90 A, with a thermal trip setting at 90 A and a magnetic trip val
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4.7
140G-H2C4-C30
Featuring 4 poles, this breaker operates within a current range of 30 A. It delivers fixed thermal and magnetic protection, ensuring dependable circuit management. The rated insulation voltage is 1000
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4.8
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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.