140G-H3C3-C20
The 140G-H3C3-C20 circuit breaker is designed to support an input current range of 20 amps. It operates at a rated insulation voltage of 1000 V and withstands impulse voltages of up to 8 kV. This mode
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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-H3C3-C70
Part number 140G-H3C3-C70 offers fixed thermal and magnetic protection types. The device is equipped for operation within a current range of 70 A. It features a rated insulation voltage of 1000 V and
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140G-H3H3-C25
The 140G-H3H3-C25 molded case circuit breaker features a robust H frame design. Rated for 125 amps with a current range of 25 A, it utilizes electronic LSI protection. This circuit breaker ensures saf
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140G-H3H4-D16
This circuit breaker, classified as H-frame, supports a current range of 160 Amps. It possesses an interrupting rating of 35 kA, ideal for managing significant fault currents. With a rated insulation
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140G-H3I4-D12
This circuit breaker operates with a frame classified as H and has four poles. It is capable of handling an electrical current range of 120 amps while providing a rated insulation voltage of 1000 volt
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140G-H6C3-C63
This circuit breaker is designed with an H frame structure and features both fixed thermal and fixed magnetic protection types. It can accommodate a current range of up to 63 A and has a rated insulat
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140G-H6C4-C60
This circuit breaker operates within an H frame and has a current rating set at 125 Amps. It features four poles and supports a current range of 60 A. The rated insulation voltage is 1000 V and withst
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140G-HC0F3-D10
This breaker belongs to the HC frame series and supports a maximum current range of 100 A. Rated insulation voltage is 1000V, while the impulse withstand voltage is 8 kV. Featuring adjustable thermal
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140G-HC0I3-C60
This circuit breaker has an HC frame type and supports a current range of 60A. With a rated insulation voltage of 1000V and a withstand voltage of 8 kV, it ensures robust protection under diverse cond
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140G-HTC4-C50
This circuit breaker is classified under the H frame with a maximum current handling of 50 Amps. The rated insulation level is 1000 volts, providing extra safety. It can also endure an impulse withsta
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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.