140G-I2C3-C70
This molded case circuit breaker is rated with a 25 kA interrupting capacity. It features both fixed thermal and fixed magnetic trip settings, providing reliable overcurrent protection. It supports a
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4.6
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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-I2C3-C90
This model features a robust frame type I design. It accommodates a current range of 90 A and provides significant durability with an 800V rated insulation voltage. The device can withstand impulse vo
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4.4
140G-I2C4-C70
This molded case circuit breaker offers fixed thermal and magnetic protection. It operates at a current range of 70 A and includes four poles. Designed to withstand rated insulation and impulse voltag
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5.0
140G-I2C4-C80
This unit, supporting four poles, operates within a current range of 80 Amps. It offers fixed thermal and magnetic protection, with an insulation voltage rated at 800 volts and an impulse withstand vo
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4.7
140G-I3C4-C60
This model features a four-pole configuration and operates within a current range up to 60 A, with a thermal trip rating at 60 A and a magnetic trip rating at 600 A. The insulation voltage is rated at
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4.7
140G-I3C4-C63
This model is equipped with four poles and offers fixed thermal and magnetic trip mechanisms for reliable operation. It operates within a specified current range of 63 A and supports a rated insulatio
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4.6
140G-J0F3-D10
This model operates within a current range of 100 A and includes adjustable thermal and magnetic protection. Designed to withstand insulation voltage ratings of 1000 V and impulse withstand voltages u
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140G-J0F4-D16
This molded case breaker employs an adjustable thermal and magnetic protection system and is configured with four poles. It supports a current capacity of 160 Amps and is rated for insulation up to 10
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4.7
140G-J0F4-D25
The 140G-J0F4-D25 molded case circuit breaker is configured with four poles and offers adjustable thermal and magnetic protection mechanisms. Its insulation voltage rating reaches up to 1000 volts, an
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4.8
140G-J0H4-C40
This molded-case circuit breaker incorporates advanced electronic LSI protection and operates at a rated current of 40 Amps. The device is rated for 1000 V of insulation voltage and can withstand impu
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5.0
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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.