140G-J3H3-D15
This molded case circuit breaker manages a current range of 150 A and maintains an insulation voltage rating of 1000 V. It can withstand impulse voltages up to 8 kV. Weighing 5.51 lbs, it is engineere
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4.9
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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-J6I4-D25
This circuit breaker is composed of four poles and functions within a rated insulation voltage of 1000 volts. Its design can withstand impulse voltages reaching 8 kV. Weighing 7.72 pounds, it features
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5.0
140G-K6I4-D40
This circuit breaker features a frame size categorized as K and operates with four poles. It supports a current range of up to 400 A and is rated for 1000 Volts of insulation voltage. The breaker with
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4.6
140G-JTF3-D16
This particular model features a JC frame and supports a current range of up to 160 Amps. The breaker is rated for an insulation voltage of 1000V and has the capability to withstand impulse voltages o
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5.0
140G-I3C3-C60
This molded case circuit breaker is designed within an I frame, providing a versatile 225 amp rating. It features a maximum interrupting capacity of 35 kA. The 140G-I3C3-C60 also has a current range o
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4.9
140G-J6C3-C70
This circuit breaker operates within a J frame and supports a current range of 70 A. It features a rated insulation voltage of 1000 V and can withstand impulse voltages of up to 8 kV. Weighing 5.51 po
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5.0
140G-K3F4-D30
This circuit breaker features four poles and operates efficiently with a rated current of 300 A and a maximum current of 400 A. With a rated insulation voltage of 1000 volts and a rated impulse withst
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4.6
140G-H0H3-C25
This molded case circuit breaker features a robust frame size H and supports a maximum current capacity of 125 amps. It utilizes electronic LSI protection and maintains a rated insulation voltage of 1
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4.4
140G-H15C3-C60
This model belongs to the 140G series and includes fixed thermal and magnetic protection. It is rated for a current range of 60 amps and designed with a robust frame H structure. The insulation voltag
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4.8
140G-H15H4-D16
This molded case circuit breaker functions effectively at 125 Amperes. It can handle up to 160 A within its current range and is configured with four poles. Its protection system is classified as Elec
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4.7
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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.