140G-J6F3-D20-KJ
Rated for a current of 200 amps, this three-pole breaker is engineered to function within an operating temperature bracket of -25°C to 70°C. It can be stored at temperatures ranging from -40°C to 80°C
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4.6
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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-M5F3-D80
The 140G-M5F3-D80 Molded Case Circuit Breaker has a Adjust Thermal/ Adjust Magnetic Protection Type and a 26.68 lb Weight.
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5.0
140G-H2F3-D11
The 140G-H2F3-D11 Molded Case Circuit Breaker has a Adjust Thermal/ Adjust Magnetic Protection Type and a 2.65 lb Weight.
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4.9
140G-H0C3-C30
This circuit breaker is engineered to support a current range of 30 amps. It is equipped with fixed thermal and fixed magnetic protection types to safeguard against electrical faults. Its rated insula
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4.7
140G-H0F3-D12
This molded case circuit breaker operates with adjustable thermal and magnetic protection mechanisms. The current range reaches 120 Amps, and it supports a rated insulation voltage of 1000 Volts. The
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4.7
140G-H15C3-C40
As part of the 140G MCB series, this circuit breaker is engineered with fixed thermal and magnetic protection features. It has a current range of 40 Amps and is rated for insulation up to 1000 Volts.
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4.8
140G-K6F3-D40-MU
This circuit breaker features three poles and is rated for 400 amperes. It supports 240 mechanical operations and 120 electrical operations per hour, ensuring durability in demanding conditions. Desig
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4.4
140G-N6H3-E12
This circuit breaker is rated for a current of 1200 A, operating at a rated insulation voltage of 1000 volts. It features an electronic LSI protection type and is able to withstand impulse voltages up
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140G-G3C4-C20
The 140G-G3C4-C20 is a molded case circuit breaker with a G frame design, suitable for various electrical installations. It has a current rating of 125 amps and can handle a maximum interrupting capac
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4.7
140G-H0F3-C80
The 140G-H0F3-C80 Molded Case Circuit Breaker has a Adjust Thermal/ Adjust Magnetic Protection Type and a 2.65 lb Weight.
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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.