140G-J3C4-C60
This breaker model includes four poles and supports a rated current of 60 Amps in addition to 250 Amps of maximum current. It also supports 1000V of rated insulation voltage and 8 kV of impulse withst
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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-J3H3-C60
This circuit breaker operates within a current range of 60 A and is designed with an insulation voltage rating of up to 1000 V. It can handle impulse voltages of 8 kV and is housed in a J frame. Weigh
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4.6
140G-J3H4-C60
Designed with a J frame, the 140G-J3H4-C60 features an electronic LSI protection type. It operates within a current range of 60 Amps and supports a rated insulation voltage of 1000 volts. With an impu
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5.0
140G-J3H4-D10
This circuit breaker includes four poles and effectively manages currents up to 100 A. It boasts a rated insulation voltage of 1000 volts and withstands impulse voltages of 8 kV. The weight of the uni
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5.0
140G-J6C4-C25
This circuit breaker operates with a current range of 25 A and is equipped with four poles. Its rated insulation voltage is 1000 volts, allowing it to function safely in elevated voltage environments.
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4.8
140G-J6C4-C60
This four-pole circuit breaker operates within a specified current range of 60 A and maintains a rated insulation voltage of 1000 V. Additionally, it withstands impulse voltages up to 8 kV. With a wei
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5.0
140G-J6F4-D10
Engineered with four poles, this breaker operates in a current range of 100 Amps. It includes adjustable thermal and magnetic protection options, allowing for fine-tuning to specific applications. It
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4.7
140G-J6F4-D12
This circuit breaker features four poles and operates with an adjustable thermal and magnetic protection system. It is capable of managing a current range of 120 A and has an interrupting rating of 65
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5.0
140G-J6H4-D10
The 140G-J6H4-D10 circuit breaker features a J frame and operates with four poles. Capable of handling a current range of 100 A, it provides a rated insulation voltage of 1000 volts. This device withs
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5.0
140G-JC0C3-C25
This molded case circuit breaker utilizes a JC frame type and features fixed thermal and magnetic protections. It has a current range of 25 A and is rated for an insulation voltage of 1000 volts. The
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4.9
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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.