140G-JTF4-D16
This circuit breaker maintains four poles and includes adjustable thermal and magnetic protection. It also supports a rated insulation voltage of 1000 volts and withstands impulse voltages of 8 kV. Th
Call
4.7
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-JTI3-C40
This circuit breaker operates with a rated current of 40 Amps and weighs 5.51 pounds. It can withstand impulse voltages of 8 kV. It has a mechanical life of 240 operations per hour and an electrical l
Call
4.6
140G-K15H3-D30
This circuit breaker unit is categorized with a K frame size and can operate at 300 A of rated current and 400 A of maximum current. It withstands rated insulation voltages of 1000 volts and has an im
Call
5.0
140G-K6K3-D30
This circuit breaker operates with 300 A of rated current and has an impressive rated insulation voltage of 1000 V. Additionally, it can withstand impulse voltages of 8 kV, enhancing its durability in
Call
5.0
140G-KC0F3-D30
This product features a KC frame and operates effectively at 300 A of rated current. The circuit breaker is rated for an insulation voltage of 1000 V and can withstand impulse voltages of 8 kV. It wei
Call
5.0
140G-M0K3-D80
This model supports a rated insulation voltage of 1000 volts and can withstand impulse voltages of up to 8 kV. Within the rated current range is a precise target of 800 A. Weighing 26.68 pounds, it is
Call
4.5
140G-M5H3-D63
This circuit breaker is designed with a frame classification of M and operates within a current range of 630 Amps. It is rated for an insulation voltage of 1000 Volts and can withstand impulse voltage
Call
5.0
140G-M6I4-D80
This circuit breaker features a maximum current capacity of 800 A and operates within a frame classification of M. It has an insulation voltage rating of 1000 V and can withstand impulse voltages up t
Call
4.4
140G-MTK3-D60
The 140G-MTK3-D60, part of the Allen-Bradley 140G series, is a molded case circuit breaker specifically designed for rigorous environments. It accommodates a maximum current of 800 Amps and features a
Call
4.9
140G-N0H4-E12
This circuit breaker has four poles and utilizes advanced electronic LSI protection. It operates within a current range of 1200 Amps. The rated insulation voltage is 1000 Volts, and the impulse withst
Call
4.9
Showing 881-890 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.