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140G MCB

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.

Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with DO Supply's 2-year warranty.
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Browse 140G MCB

Browse available units in our catalog of 140G MCB.

140G-G-EA2R1A

The catalog number 140G-G-EA2R1A identifies an auxiliary contact block designed and built by Allen-Bradley in order to provide additional signals for the remote monitoring of the open or closed condit

In Stock Ships Today
5.0

140G-G2C3-C15

The 140G-G2C3-C15 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.

Available
4.8

140G-G2C3-C16

The 140G-G2C3-C16 is a molded case circuit breaker in the Allen-Bradley 140G series. Capable of managing up to 125 amps, it features fixed thermal and magnetic protections. The device can support a cu

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4.9

140G-G2C3-C20

The 140G-G2C3-C20 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.

Available
5.0

140G-G2C3-C25

The 140G-G2C3-C25 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.

In Stock Ships Tomorrow
4.8

140G-G2C3-C30

The 140G-G2C3-C30 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.

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4.9

140G-G2C3-C32

The 140G-G2C3-C32 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.

Available
5.0

140G-G2C3-C35

The 140G-G2C3-C35 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.

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4.8

140G-G2C3-C40

The 140G-G2C3-C40 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.

Available
4.9

140G-G2C3-C45

The 140G-G2C3-C45 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.

In Stock Ships Tomorrow
4.8
Showing 1-10 of 1,171 results

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.