140G-K0F4-D30
This breaker model includes four poles and offers adjustable thermal and magnetic protection mechanisms. It operates at 300 amps of rated current and is rated for 1000 volts of insulation voltage. Cap
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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 available units in our catalog of 140G MCB.
140G-K6I3-D40
This circuit breaker, featuring a K frame, functions effectively within a current range of up to 400 A. It is rated for up to 1000 volts of insulation voltage and withstands impulse voltages of up to
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4.7
140G-N0H3-E12-Z1
This model qualifies as a frame N circuit breaker and operates efficiently within a rated insulation voltage of 1000 volts. It can withstand impulse voltages of 8 kV, ensuring durability during transi
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4.7
140G-N6I3-E12
This breaker features an N frame size and operates at a rated insulation voltage of 1000 volts. It can endure impulse voltages rated at 8 kV, making it suitable for varied applications. The unit weigh
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4.6
140G-N6I3-E12-Z1
Rated for 1200 Amps, this device features an interrupting rating of 60 kA and operates within a rated insulation voltage of 1000 volts. Its impulse withstand voltage is up to 8 kV. The design weighs 2
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4.4
140G-KC0F3-D40
This molded case circuit breaker works at a rated current of 400 A and has a robust KC frame design. It is rated to handle insulation voltages up to 1000 volts and can withstand impulse voltages of 8
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4.8
140G-G6C4-D11
Featuring four poles, the 140G-G6C4-D11 operates efficiently across a current range of 110 A. Designed for safety, it includes fixed thermal and magnetic trip mechanisms. Its interrupting capacity is
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140G-H-FCX04
This cable operator is compatible with Frame H circuit breakers and showcases a non-metallic handle. It allows padlock locking for enhanced security. The NEMA protection ratings include Types 1, 3, 4,
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140G-H0C4-C40
The 140G-H0C4-C40 serves as a four-pole, molded case circuit breaker with a specified current range of 40 Amps. It provides both fixed thermal and fixed magnetic protection types, with a rated insulat
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140G-H0C4-C70
The 140G-H0C4-C70 circuit breaker features four poles and operates within a current range of 70 Amps. It has a high interrupting rating of 100 kA, ensuring it can handle severe fault conditions. It is
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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.