140G-KTK4-D40
This circuit breaker is designed with four poles and accommodates a rated current of 400 A. It possesses a rated insulation voltage of 1000 volts and has a reliable impulse withstand voltage of up to
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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-G-SND
This molded case circuit breaker operates with control voltages ranging from 110 V to 127 V, both AC and DC. It is rated for maximum operating altitudes of 1000 meters and can function effectively wit
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140G-H3C3-C30
This molded case circuit breaker operates within a current range of 30 A and features fixed thermal and magnetic protection types. The insulation voltage capability is rated at 1000 V, while it can wi
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5.0
140G-HC0C3-C30
The model 140G-HC0C3-C30 is specifically designed to accommodate a current range of 30 A. It can handle a rated insulation voltage of 1000V, along with an impulse withstand voltage rated at 8 kV. The
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140G-HC6C3-C40
This device features a fixed thermal and magnetic protection mechanism and operates at a current range of 40 A. It supports a rated insulation voltage of 1000V and withstands impulse voltages up to 8
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140G-H0C4-C15
The 140G-H0C4-C15 belongs to the molded case circuit breaker series and is equipped with four poles. It operates within a current range of 15 amps and is backed by fixed thermal and magnetic protectio
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140G-H0F4-C90
This circuit breaker has an adjustable thermal and magnetic protection type, which ensures versatility in various environments. It consists of four poles and operates within a current range of 90 A. W
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140G-H0I3-D10
This circuit breaker features an H frame configuration with a current range of 100 A. It utilizes electronic LSIG protection for enhanced fault management. The 140G-H0I3-D10 supports a rated insulatio
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140G-H15C3-C25
The 140G-H15C3-C25 is a molded case circuit breaker that operates with a frame size type H. With a maximum current rating of 125 Amps and a fixed thermal/magnetic protection method, it caters to load
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140G-H15F3-D11
As part of the 140G MCB series, the 140G-H15F3-D11 features adjustable thermal and magnetic protection for customizable circuit management. Rated for 125 amps, it is capable of handling a maximum curr
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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.