140G-I2C4-D10
This circuit breaker has four poles and provides fixed thermal and magnetic protection types, with a current range of 100 A for effective circuit management. It supports a rated insulation voltage of
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4.7
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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-J0C4-C70
This device utilizes a four-pole configuration and features fixed thermal and magnetic protection mechanisms. It supports a current range of 70 Amps and is rated for insulation at 1000 Volts. The impu
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4.9
140G-J0H3-D25
This circuit breaker is designed for a rated current of 250 amperes. It has a J frame size and a compact design. The breaker's rated impulse withstand voltage is specified at 8 kV, enhancing its resil
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4.6
140G-J2F4-D20
This molded-case circuit breaker features four poles and handles 200 A of rated current and 250 A of maximum current. It is rated for 1000 V of insulation voltage and can withstand impulse voltages of
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4.9
140G-J2F4-D25
This circuit breaker operates with four poles and supports adjustable thermal and magnetic protection options. It handles 250 Amps of current, 1000 volts of rated insulation voltage, and 8 kV of impul
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5.0
140G-JC0C3-C70
This circuit breaker supports fixed thermal and magnetic protection mechanisms, featuring a current range of 70 A. It can withstand a rated insulation voltage of 1000 V and impulse voltages of up to 8
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4.9
140G-JC0F3-D20
This circuit breaker, featuring a JC frame, offers adjustable thermal and magnetic protection types. It operates within a current range of up to 200 A and has a rated insulation voltage of 1000 volts.
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4.9
140G-JC6C3-C40
This molded case circuit breaker operates with a current range of 40 Amps and is constructed within a JC frame type. The rated insulation voltage is 1000 volts, and the product can withstand impulse v
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5.0
140G-JTF3-D11
This molded case circuit breaker is designed with adjustable thermal and magnetic protection, supporting a current range of 110 Amps. It has a trip unit for its interrupting rating. The unit weighs 5.
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4.7
140G-JTF4-D20
Operating within a current range of 200 A, the 140G-JTF4-D20 is built within a J-frame for optimal performance. It maintains a rated insulation voltage of 1000 volts and can withstand impulse voltages
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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.