140G-R12I4-E25
The 140G-R12I4-E25 is built with an R-frame size. This unit operates on a four-pole system, which is essential for three-phase applications. Operating at a rated insulation voltage of 1000 volts, it c
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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-MTI3-D80
This unit is engineered with an M frame and features an electronic LSIG protection mechanism. The circuit breaker boasts an interrupting rating via a trip unit and can handle impulse withstand voltage
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140G-J0C4-C63
This model is equipped with four poles and provides fixed thermal and magnetic protection mechanisms. The device operates effectively within a current range of 63 A and is rated for insulation voltage
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140G-ELTT
This testing device is optimized for frequencies between 50 Hz and 60 Hz. Designed as a battery-powered unit, it offers convenient operation wherever needed. It can perform in both storage and operati
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140G-JC0H3-C60
This unit, featuring electronic LSI for protection, is designed with a JC frame. It accommodates a current range of 60 Amps and has a rated insulation voltage of 1000 Volts. The impulse withstand volt
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140G-JC6C3-C30
This molded case circuit breaker features a JC frame and operates with a maximum current rating of 250 Amps. It allows for a current range of 30 Amps and is built to withstand a rated insulation volta
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140G-JTC4-C50
This circuit breaker features four poles and operates within a current range of 50 A. It is suitable for 1000V rated insulation voltage and can handle impulse withstand voltages of up to 8 kV. Weighin
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140G-JTH3-D15
Offering a current range of 150 A, the 140G-JTH3-D15 is capable of operating under a rated insulation voltage of 1000 volts. Its impulse withstand rating reaches 8 kV, presenting robust durability in
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140G-K6H4-D30
This circuit breaker is designed with a K frame. It supports a maximum current rating of 400 Amps and a rated current of 300 A. It features four poles and operates at a rated insulation voltage of 100
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140G-KTH4-D30
This circuit breaker is rated for a current range of 300 Amps. It operates at an insulation voltage of 1000 volts and can withstand impulse voltages of 8 kV. Built with a K frame, it weighs 9.15 pound
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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.