140G-JC0F3-D17
This circuit breaker features a JC frame type and can handle currents of up to 170 A. It operates at a rated insulation voltage of 1000 V and can withstand impulse voltages of 8 kV. Weighing 5.51 poun
Call
4.6
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-JC6C3-C25
This breaker features a JC frame and operates at a fixed thermal and magnetic protection type with a current range of 25 Amps. It can withstand rated insulation voltages of up to 1000 Volts and can en
Call
4.7
140G-JTC3-C60
This unit is characterized by its 60 A current range and a rated insulation voltage of 1000 V. Additionally, it can withstand impulse voltages of 8 kV, making it suitable for demanding environments. W
Call
4.5
140G-K0I4-D40
This circuit breaker has four poles and utilizes electronic LSIG protection technology. It supports a current range of up to 400 A and is rated for 1000 V insulation voltage. The 140G-K0I4-D40 breaker
Call
4.9
140G-K0K4-D40
This circuit breaker unit is designed with a K frame and supports up to 400 A in current. It has a rated insulation voltage of 1000 volts and withstands impulse voltage up to 8 kV. The device weighs 9
Call
4.9
140G-K15H3-D40
This circuit breaker operates within a current range of 400 A and employs electronic LSI protection for enhanced safety. It is constructed to endure demanding environments and is rated for up to 1000
Call
5.0
140G-KC0X3
Operating at a rated insulation voltage of 1000 volts, this breaker is capable of handling impulse withstand voltages up to 8 kV. Its KC frame assures compatibility for specific applications, while it
Call
4.7
140G-KTK3-D30
This circuit breaker maintains a rated current of 300 A and is designed for a rated insulation voltage of 1000 volts. It can withstand impulse voltages of up to 8 kV. The device weighs 7.17 pounds, co
Call
4.6
140G-KTK4-D30
This breaker unit features electronic LSIG and MM protection and has four poles. It operates effectively with a rated current of 300 Amps. The unit boasts a rated insulation voltage of 1000 volts and
Call
4.9
140G-M0H4-D60
This molded case circuit breaker is designed to handle a maximum current range of 600 A. It maintains a rated insulation voltage of 1000 volts and can withstand impulse voltages of 8 kV. It weighs 33.
Call
4.4
Showing 1,091-1,100 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.