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.
Browse available units in our catalog of 140G MCB.
This circuit breaker features an N frame type and operates within a current range of 1200 A. It uses electronic LSIG protection and has a rated insulation voltage of 1000 V. The device withstands impu
Designed for efficient protection, this circuit breaker operates at a rated insulation voltage of 1000 volts and can withstand impulse voltages of up to 8 kV. It has a weight of 21.39 pounds and mecha
This circuit breaker has four poles and utilizes an electronic LSIG protection system. It maintains a rated insulation voltage of up to 1000 volts and is rated for impulse voltages of 8 kV. Weighing 2
With a weight of 27.56 pounds, the 140G-N6K4-E12 is designed with an N frame size, allowing it to support a continuous current range of 1200 A. The unit has a rated insulation voltage of 1000 volts an
This accessory belongs to the 140G MCB series and accommodates frame size K-M. It functions effectively within a temperature range of 0 °C to 40 °C for both operation and storage. The device can susta
This model features a frame classification of H and supports a current range of 25 A. The unit provides an interrupting capacity of 35 kA, ensuring effective circuit protection. Rated for insulation u
This circuit breaker features an H-frame design with a current range of 160 A. It is rated for insulation voltages of 1000 V and can withstand impulse voltages of 8 kV. The operational specifications
This molded case circuit breaker operates at an interrupting rating of 35 kA. It includes fixed thermal and magnetic protection and has a current handling capacity of 15 A. It can withstand a rated in
The 140G-H3H3-C25 molded case circuit breaker features a robust H frame design. Rated for 125 amps with a current range of 25 A, it utilizes electronic LSI protection. This circuit breaker ensures saf
This specific circuit breaker integrates four poles and utilizes electronic LSI protection. It manages a current range of 25 amps, with a rated insulation voltage of 1000 volts and withstands impulse
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.