140G-J6F4-D25
Operating within a 250 amp range, this four-pole circuit breaker comes equipped with adjustable thermal and magnetic protection features. It handles insulation voltage ratings up to 1000 V and can wit
Call
4.9
Free UPS Ground on All Orders!
+1 (919) 205-4392
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.
Learn more
Browse 140G MCB
Browse available units in our catalog of 140G MCB.
140G-H0C4-C20
This product supports a 4-pole configuration and handles a current range of 20 amps. Its rated insulation voltage is an impressive 1000 volts, while the device can withstand impulse voltages of 8 kV.
Call
4.6
140G-H0I3-D12
Designed within the 140G series, the 140G-H0I3-D12 offers electronic LSIG protection and a current range up to 120 Amps. It has a rated insulation voltage of 1000 V and withstands impulse voltages rea
Call
4.9
140G-H15I4-C25
This model is a molded case circuit breaker characterized by its H-frame design. It supports a current range of 25 A and operates with four poles. The unit's protection type is classified as Electroni
Call
4.7
140G-H15I4-D12
Designed with electronic LSIG protection, this model is suitable for applications requiring precise load management. The 140G-H15I4-D12 has a current range up to 120 A and is rated for insulation volt
Call
4.6
140G-H3F4-C80
This four-pole circuit breaker, the 140G-H3F4-C80, is suitable for currents up to 80 amps. It features adjustable thermal and magnetic protection types, ensuring precise response to overloads. With a
Call
4.6
140G-H3H3-D10
This molded case circuit breaker is rated for a maximum insulation voltage of 1000 V and can withstand impulse voltages of 8 kV. It is housed within an H frame type. Weighing 2.65 pounds, it supports
Call
5.0
140G-H3H4-D10
The 140G-H3H4-D10 is a four-pole circuit breaker that features an electronic LSI protection mechanism, suitable for managing a range of 100 A. This unit supports rated insulation up to 1000 V and can
Call
4.8
140G-H6C4-C40
With four poles, the 140G-H6C4-C40 model can handle currents up to 40 amps. Its protection capabilities come from fixed thermal and magnetic mechanisms. Additionally, the rated insulation voltage for
Available
4.9
140G-H6C4-C70
This circuit breaker is a part of the H frame series and utilizes a fixed thermal and fixed magnetic protection type. It supports a current range of 70 amps and is configured with four poles. The rate
Call
4.7
Showing 541-550 of
1,219
results
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.