140G-H15C4-C63
Featuring four poles, the 140G-H15C4-C63 circuit breaker supports a current range of up to 63A. It has a high interrupting rating of 150 kA, ensuring it can handle substantial fault current scenarios.
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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-H6H3-D12
This circuit breaker features an electronic LSI protection type and supports a current range of 120 Amps. With a rated insulation voltage of 1000 V and an impulse withstand capability of 8 kV, it ensu
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4.9
140G-I3C3-D12
This model features a frame type I and supports fixed thermal and magnetic protection. It can manage a current range up to 120 A, with a thermal trip set at 120 A and a magnetic trip capable of 1200 A
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140G-J2F3-D22
This circuit breaker operates with an interrupting capacity of 25 kA, a current rating of 220 A, and a maximum current rating of 250 A. It has a type J frame and ensures stability and compatibility wi
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4.5
140G-J2H3-D25
The 140G-J2H3-D25 J-frame breaker has a rated insulation voltage of 1000 V and withstands impulse voltages up to 8 kV. Weighing 5.51 pounds, this unit allows for a mechanical life rating of 240 operat
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140G-G2C4-D11
The 140G-G2C4-D11 is a molded case circuit breaker designed for demanding electrical applications. It has a frame designated as G, rated for 125 amps. This model supports a fixed thermal and magnetic
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4.4
140G-G3C3-C63
The 140G-G3C3-C63 molded case circuit breaker boasts an impressive interrupting rating of 35 kA, providing essential protection for electrical circuits. With a frame designation of G and a thermal tri
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140G-G3C4-C16
The 140G-G3C4-C16 is a molded case circuit breaker, designed for robust performance with a G frame construction. It handles a current range of 16 Amps while supporting a maximum rated insulation volta
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140G-G6C4-C25
The 140G-G6C4-C25 circuit breaker provides exceptional protection with its fixed thermal and magnetic features. It operates in a 25 A current range and is built with four poles. With an interrupting r
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140G-H0C3-C50
This molded case circuit breaker is designed with an H frame and operates across a current range starting at 50 A. Its protection mechanisms include fixed thermal and fixed magnetic options. It mainta
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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.