140G-JC0F3-D22
This breaker features adjustable thermal and magnetic protection with a JC frame configuration. It supports an insulation voltage of up to 1000 V and has an impulse withstand rating of 8 kV. The unit
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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-JTC4-C30
With a current range of 30 amps, the 140G-JTC4-C30 features four poles. It supports a rated insulation voltage of 1000 volts and can withstand impulse voltages of up to 8 kV. The device weighs 7.72 po
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140G-JTC4-C63
This molded case circuit breaker includes four poles and a J frame, optimizing its adaptability in various installations. It provides robust protection with fixed thermal and magnetic settings and is
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140G-K6I4-D30
This circuit breaker supports a rated current of 300 A and is suitable for high-voltage applications with a rated insulation voltage of 1000 volts. It withstands impulse voltages of 8 kV. Weighing 9.1
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140G-M0H4-D63
This 140G series molded case circuit breaker features a frame classification of M and accommodates a range of 630 Amps. It operates under insulation voltage specifications of 1000 volts and can withst
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140G-M6I4-D60
This molded case breaker features a rating for currents up to 600 A and operates at a rated insulation voltage of 1000 volts. It can withstand impulse voltages of 8 kV and is rated for mechanical oper
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140G-N5K4-E12-Z1
This circuit breaker features a frame size of N and is capable of handling a current range of up to 1200 A. Its interrupting capacity is rated at 50 kA. It also includes electronic LSIG protection fun
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140G-H2I3-D12
This breaker is designed with an H frame and can effectively manage up to 120 A of current. It features an interrupting rating of 25 kA, and offers a rated insulation voltage of 1000 V. The module wit
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140G-H3H4-D12
The 140G-H3H4-D12 circuit breaker is designed with an H frame and supports a current range of 120 A. It provides a rated insulation voltage of 1000 V and withstands impulse voltages up to 8 kV. The un
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140G-H3I4-C60
The 140G-H3I4-C60 circuit breaker features a maximum rated insulation voltage of 1000 Volts and can withstand impulse voltages of up to 8 kV. It operates within a current range of 60 Amps and boasts a
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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.