140G-JTF3-C90
This circuit breaker includes a rated insulation voltage of 1000 volts and can withstand impulse voltages up to 8 kV. Its weight is approximately 5.51 pounds. The 140G-JTF3-C90 has a mechanical lifesp
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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 available units in our catalog of 140G MCB.
140G-K0F4-D30
This breaker model includes four poles and offers adjustable thermal and magnetic protection mechanisms. It operates at 300 amps of rated current and is rated for 1000 volts of insulation voltage. Cap
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140G-K0I4-D30
Designed with a K frame, the 140G-K0I4-D30 has four poles. It accommodates a rated current of 300 A and operates safely at a rated insulation voltage of 1000 V. This unit can withstand impulse voltage
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140G-K15K3-D40
This molded-case circuit breaker features electronic LSIG and MM protection and boasts a rated insulation voltage of 1000 volts. It can handle impulse withstand voltages of up to 8 kV. The device weig
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140G-K6K3-D40
This circuit breaker is designed with a K frame and supports current handling at up to 400 A. The insulation voltage rating reaches 1000 Volts, and it withstands impulse voltages up to 8 kV. It weighs
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140G-M6K3-D63
This circuit breaker operates efficiently within a current range of 630 A and features an interrupting rating of 65 kA. It is housed in an M-frame structure and exhibits strong durability characterist
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140G-N5K3-E12
The 140G-N5K3-E12 is a high-performance molded case circuit breaker suitable for industrial applications. This model accommodates a maximum current of 1200 amperes and is designed with an interrupting
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4.9
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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140G-H3C3-C60
This molded case circuit breaker is built upon an H frame and features fixed thermal and magnetic protection types. The current range it supports is set at 60 A while maintaining a rated insulation vo
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140G-H6F3-D11
This circuit breaker utilizes adjustable thermal and magnetic protection. It can manage currents up to 110 A and has an insulation voltage rating of 1000 V. The impulse withstand voltage is rated at 8
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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.