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 molded case circuit breaker is categorized under the Allen Bradley G frame series. With a 35 kA interrupting rating and a current range capability of 160 A, the 140G-G3E3-D16 ensures dependable c
The 140G-R12I3-E20 Molded Case Circuit Breaker has a Electronic LSIG Protection Type and a 175 lb Weight.
The 140G-H6C3-C35 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.65 lb Weight.
This molded case circuit breaker features a fixed thermal and magnetic protection system. It can handle a current range of up to 150 A with a thermal trip setting at 150 A and a magnetic trip setting
This circuit breaker is built on an I-frame and has a current range of 200 A. It offers a reliable interrupting capacity rated at 25 kA and supports a rated insulation voltage of 800 Volts. Additional
The 140G-G3C3-C15 is classified as a molded case circuit breaker from the Allen Bradley 140G series, designed to handle a fixed thermal and magnetic protection system. It features a current range suit
The 140G-J6F3-D22 Molded Case Circuit Breaker has a Adjust Thermal/ Adjust Magnetic Protection Type and a 5.51 lb Weight.
This circuit breaker operates with a current rating of 125 Amps, optimized for a frame size of H. The insulation voltage is rated at 1000 V, while the impulse withstand voltage is rated at 8 kV. Mecha
This device is structured in a JC frame and is designed to provide protection through adjustable thermal and magnetic mechanisms. It functions within a current range of 250 A and maintains a rated ins
The 140G-G3C3-C45, a product classified under molded case circuit breakers, features a unique G frame design. This device supports a maximum current capacity of 125 Amps and can handle a continuous lo
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.