140G-JC6I3-D15
This circuit breaker features a JC frame and provides protection via an electronic LSIG mechanism. Designed to manage a current range up to 150 Amps, it operates safely at a rated insulation voltage o
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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 available units in our catalog of 140G MCB.
140G-J2I3-D25
This circuit breaker features a J frame design and operates within a current capacity of 250 A. It supports a rated insulation voltage of 1000 V and has the capability to withstand impulse voltages of
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140G-H0F3-D11
Designed with a frame size of H, the 140G-H0F3-D11 circuit breaker can handle interruptions up to 100 kA. This unit supports a current range of 110 Amps. The insulation voltage rating is 1000 Volts, a
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140G-H2F4-C90
This 4-pole circuit breaker operates at a current range of 90 A and has adjustable thermal and magnetic protection. It is rated for an insulation voltage of 1000 V and can withstand impulse voltages u
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140G-H2F4-D12
This circuit breaker offers an H frame construction with four poles and supports an adjustable thermal and magnetic protection type. Its current operating range is set at 120 amps, with rated insulati
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140G-H3C4-C15
This molded case circuit breaker operates at an interrupting rating of 35 kA. It includes fixed thermal and magnetic protection and has a current handling capacity of 15 A. It can withstand a rated in
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4.7
140G-H3C4-C40
This four-pole circuit breaker supports a current range of 40 Amps and includes fixed thermal and magnetic protection types. It operates effectively under rated insulation voltages up to 1000 Volts an
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140G-H3C4-C70
This model offers four poles and operates at a current range of 70 A. It features fixed thermal and magnetic protection methods, suitable for a robust electrical infrastructure. The device maintains a
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140G-H3F4-D10
Crafted with an H frame, the 140G-H3F4-D10 offers reliable overcurrent protection utilizing adjustable thermal and magnetic trip settings. It features four poles with a current handling capability of
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140G-H6C4-C20
With four poles, the 140G-H6C4-C20 operates in a current range of up to 20 amps. It provides a rated insulation voltage of 1000 volts and can withstand impulse voltages of 8 kV, indicating its strong
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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.