140G-H2C4-C70
This circuit breaker supports a current range of up to 70 Amps and is rated for insulation voltage of 1000 V. It withstands impulse voltages up to 8 kV. Weighing 3.53 pounds, it provides robust mechan
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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-G3C4-C30
The 140G-G3C4-C30 is classified as a molded case circuit breaker that operates with a 125 amp capacity. This breaker is designed with a G frame and uses four poles for versatile applications. It maint
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140G-G3C4-C63
The 140G-G3C4-C63 circuit breaker is designed for effective performance in demanding applications. With a rated insulation voltage of 800 V and an impulse withstand voltage of up to 8 kV, this device
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140G-G3C4-C35
The model 140G-G3C4-C35 is a molded case circuit breaker employed as part of the G frame series. It supports a maximum current rating of 125 Amps and provides an interrupting capacity of 35 kA. This c
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140G-J3F3-D17
Operating in the 170 Amp current range, the 140G-J3F3-D17 breaker is rated for insulation up to 1000 Volts. It withstands impulse voltages of 8 kV. Weighing 5.51 pounds, the device supports a mechanic
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140G-J2F3-D22
This circuit breaker operates with an interrupting capacity of 25 kA, a current rating of 220 A, and a maximum current rating of 250 A. It has a type J frame and ensures stability and compatibility wi
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140G-G3C4-D11
As part of the 140G series, the 140G-G3C4-D11 delivers reliable circuit protection with a fixed thermal trip set at 110 amps and a magnetic trip capability of 1100 amps. This unit supports a maximum i
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140G-H0C3-C20
In the 140G line, the 140G-H0C3-C20 features a frame size of H, with a current range capable of handling up to 20 A. Its fixed thermal and magnetic protection mechanisms enhance reliability, while it
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140G-H0F3-D10
This molded case circuit breaker operates under a frame of type H and supports a current range of 100 A. The rated insulation voltage is 1000 V, with an impulse withstand voltage rated at 8 kV. The pr
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140G-G6C3-C16
This molded case circuit breaker has three poles and accommodates a current range of 16 amps. It offers robust protection with a thermal trip setting at 16 amps and a magnetic trip threshold of 500 am
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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.