140G-J2C3-C30
This molded case circuit breaker operates with fixed thermal and fixed magnetic protection types. It supports a rated current of 30 A and a maximum current rating of 250 A. It is rated for an insulati
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4.5
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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-J2C4-C25
This circuit breaker incorporates a four-pole design and functions with a current rating of 25 Amps and a maximum rated current of 250 Amps. It is equipped with fixed thermal and fixed magnetic protec
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4.9
140G-J2C4-C35
This breaker is configured with four poles and supports 35 Amps of rated current and up to 250 Amps of maximum current. It is rated for an insulation voltage of 1000 V and withstands impulse voltages
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5.0
140G-J2F3-D11
This breaker is a J-frame circuit breaker and supports a current rating of 110 amps. Its maximum current rating is 250 amps and it is designed to handle a rated insulation voltage of 1000 volts. It ca
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4.9
140G-J2F4-D15
This breaker has a J frame and includes four poles for adaptability. It supports a current rating of 150 A and up to 250 A of maximum current. Its insulation voltage is rated at 1000 V, and it can wit
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4.6
140G-J3C4-C30
As part of the 140G series, this circuit breaker employs four poles and has a fixed thermal and magnetic protection system. The 140G-J3C4-C30 breaker has a maximum interrupting rating of 35 kA. It fea
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4.7
140G-J3C4-C40
This circuit breaker has a J-frame and operates with four poles. It supports a rated current of 40 A and a maximum current of 250 A and is rated for up to 1000 V of insulation voltage. Furthermore, it
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4.7
140G-J3I4-C40
This model supports a current range of 40 Amps and operates with an insulation voltage rating of 1000 Volts. It can withstand impulse voltages up to 8 kV. Weighing 7.72 pounds, this unit is designed f
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4.7
140G-J6C4-C30
This circuit breaker operates with four poles and utilizes fixed thermal and magnetic protection mechanisms. Its current handling is rated at 30 Amps, and it maintains a rated insulation voltage of 10
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5.0
140G-J6F4-D20
This circuit breaker operates with an adjustable thermal and magnetic protection type. It has four poles and manages a current range of 200 A. Furthermore, it offers rated insulation voltage of 1000V
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4.6
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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.