140G-M5H4-D80
The 140G-M5H4-D80 operates with a frame type M and is built to handle a maximum current range of 800 A. Its rated insulation voltage is 1000 volts, and it is capable of withstanding impulse voltages u
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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-M5I3-D80
With an M frame structure, this circuit breaker is equipped with electronic LSIG protection. It operates effectively at a rated insulation voltage of 1000 volts and is capable of withstanding impulse
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4.7
140G-M5K3-D80
Configured with an M frame, this circuit breaker supports a significant interrupting rating of 50 kA and operates efficiently under a rated insulation voltage of 1000 volts. The unit withstands impuls
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4.6
140G-M6H4-D63
This circuit breaker operates in a range of 630 A and has a frame designated as M. It can sustain a rated insulation voltage of 1000 volts and withstand impulse voltages of 8 kV. The weight of the uni
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140G-N5I4-E12-Z1
This molded case circuit breaker accommodates a current range of 1200 A and has a frame designation of N. It operates with a rated insulation voltage of 1000 volts and can withstand impulse voltages u
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140G-NS0H4-E12
This circuit breaker features an NS frame design and incorporates four poles for operational versatility. Rated for an insulation voltage of 1000 volts and capable of withstanding impulse voltages up
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5.0
140G-NS5K4-E12
This device features an NS frame size built to accommodate four poles. It operates effectively within a current range of 1200 A. The rated insulation voltage is 1000 volts, and it can withstand impuls
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140G-R12I4-E25-Z1
Designed with an R frame type, this molded case circuit breaker offers an interrupting rating of 125 kA. It contains four poles and supports a maximum rated insulation voltage of 1000 volts, along wit
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140G-JC0C3-C32
This circuit breaker operates with a fixed thermal and magnetic protection type and has a current range of 32 amps. It maintains a rated insulation voltage of 1000 volts, with the ability to withstand
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140G-M0K4-D60
With four poles, the 140G-M0K4-D60 is capable of managing a current range of 600 A. It also offers electronic LSIG protection, making it suitable for various industrial applications. The rated insulat
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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.