140G-J3F4-D17
This four-pole circuit breaker operates at a current range of 170 A. It is equipped with adjustable thermal and magnetic protection types. Rated for 1000 volts, it also withstands impulse voltages of
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-J3H3-C40
This device operates with a current range of 40 A and provides ratings for insulation voltage of 1000 V and impulse withstand voltage of 8 kV. It is equipped with a J-sized frame and weighs 5.51 pound
Call
5.0
140G-J6C4-C32
This circuit breaker features a J frame design and is equipped with four poles. Its operational current range reaches up to 32 A. The rated insulation voltage is 1000 V, and it is built to withstand i
Call
4.8
140G-J6F4-C80
This breaker operates within a current range of 80 Amps and is built with four poles. Rated for insulation voltages up to 1000V, it also withstands impulse voltages of 8 kV. Its weight is approximatel
Call
4.4
140G-J6I4-C60
Featuring a frame size denoted as J, this breaker operates with four poles. It maintains a current range of 60 A and is compatible with insulation up to 1000 V. The impulse withstand voltage is rated
Call
5.0
140G-JC0C3-C40
This circuit breaker employs fixed thermal and magnetic protection types and operates within a current range of 40 A. It has a rated insulation voltage of 1000 V and withstands impulse voltages of 8 k
Call
4.7
140G-JC0C3-C50
This model features a JC frame and operates effectively within a current range of 50 Amps. It is built to withstand rated insulation voltages up to 1000 volts and can handle impulse withstand voltages
Call
4.9
140G-JC0I3-D15
This model operates efficiently within a current range of 150 Amps. It features electronic LSIG protection and has a rated insulation voltage of 1000V, coupled with an impulse withstand rating of 8 kV
Call
4.7
140G-JC0X3
The 140G-JC0X3 breaker has a JC frame and operates at a rated insulation voltage of 1000V. It can handle an impressive interrupting rating of 100 kA, ensuring reliable operation under fault conditions
Call
4.9
140G-JC6C3-C35
This device provides fixed thermal and fixed magnetic protection. It is rated for insulation voltage of 1000 Volts and an impulse withstand voltage of 8 kV. With a weight of 5.51 pounds, it has a mech
Call
4.7
Showing 1,021-1,030 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.