140G-J2C4-C50
This circuit breaker comes with a type J frame, four poles, a current rating of 50 A, and a maximum current of 250 A. It is engineered for a rated insulation voltage of 1000 V and can withstand impuls
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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-J3C3-C60
This circuit breaker has a J frame design. It supports a rated current of 60 A and has a 35 kA interrupting capacity. Its rated insulation voltage is 1000 V, and it can withstand impulse voltages of u
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140G-JC0F3-D10
Incorporating a JC frame size, the 140G-JC0F3-D10 operates within a current range of 100 amps. It has an insulation voltage rating of 1000 volts and can withstand impulse voltages up to 8 kV. The brea
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140G-JTI4-C40
The 140G-JTI4-C40 breaker model has four poles and supports a rated current of 40 A. It has an insulation voltage rating of 1000V and is designed to handle impulse withstand voltages up to 8 kV. The d
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140G-M6K3-D80
This circuit breaker is constructed with a frame classified as M and is capable of managing a current of 800 A. Rated for insulation of 1000 volts, it also withstands impulse voltages of up to 8 kV. T
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140G-J0F4-D11
This circuit breaker has a 4-pole configuration and operates effectively within a current range of 110 Amps. It is rated for insulation at 1000 volts and capable of withstanding impulse voltages of 8
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140G-K3H4-D30
Configured with four poles, the 140G-K3H4-D30 supports a rated current of 300 A and operates effectively at insulation voltages of 1000 volts. The breaker can withstand impulse voltages up to 8 kV. It
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140G-G6C4-C30
This model features a robust 65 kA interrupting capacity and includes four poles, facilitating reliable operation across diverse applications. It has fixed thermal and magnetic protection, designed fo
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140G-H0C3-C35
This device belongs to the Allen-Bradley 140G series, showcasing its H-frame design. It features a fixed thermal and magnetic protection mechanism, ensuring safeguarding against various fault conditio
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140G-H0C4-C15
The 140G-H0C4-C15 belongs to the molded case circuit breaker series and is equipped with four poles. It operates within a current range of 15 amps and is backed by fixed thermal and magnetic protectio
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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.