140G-HC0X3
Designed for robustness, this model features a HC frame and is rated for insulation voltage up to 1000V. It has a rated impulse withstand voltage of 8 kV and is structured to support a high number of
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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-HC6F3-D10
This molded case circuit breaker features adjustable thermal and magnetic protection types. The effective current range is rated at 100 Amps. It can withstand a rated insulation voltage of 1000 V and
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140G-HTF3-C90
This circuit breaker has a trip unit rating that accommodates various applications. It is constructed with an HC frame and provides an insulation voltage rating of 1000 volts. With an impulse withstan
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140G-HTH3-D12
This molded case circuit breaker includes an HC frame and is rated for 120 A operation. It is designed for electrical applications requiring insulation up to 1000 V and can withstand impulse voltages
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140G-J2F4-D17
This circuit breaker model features a robust frame designated as a type J frame and has a four-pole configuration. It supports a current rating of 170 A, up to 250 A of maximum current, and an interru
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140G-JC6F3-D22
This molded case circuit breaker is equipped with adjustable thermal and magnetic protection features. Operating within a current range up to 220 A, it has a rated insulation voltage of 1000V and with
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140G-M5H4-D60
The 140G-M5H4-D60 features four poles and is rated for a current range of up to 600 Amps. It is rated for impulse withstand voltages of 8 kV. This breaker weighs 33.29 pounds and is designed for mecha
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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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140G-I2C3-D16
This molded case circuit breaker features a frame size of I and operates effectively within a current range of 160 A. Its rated insulation voltage is 800 V, while the impulse withstand voltage is rate
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140G-G3C4-C40
The 140G-G3C4-C40 is a four-pole molded case circuit breaker rated at 125 Amps. It features fixed thermal and magnetic protection options with a current range of 40 Amps. The device handles an interru
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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.