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 is designed for adjustable thermal and magnetic protection, ensuring adaptability in various applications. It has a current handling capability of 90 A and rated insulation voltag
The 140G-H2F3-C80 Molded Case Circuit Breaker has a Adjust Thermal/ Adjust Magnetic Protection Type and a 2.65 lb Weight.
This circuit breaker operates with four poles and features fixed thermal and magnetic protection types. It can effectively handle a thermal trip setting of 160 Amps and a magnetic trip rating of 1600
As part of the 140G MCB series, this circuit breaker is engineered with fixed thermal and magnetic protection features. It has a current range of 40 Amps and is rated for insulation up to 1000 Volts.
With a robust IP56 rating, this flex cable mechanism is suitable for a variety of environments and can withstand moisture and dust. It supports mounting via flange and operates efficiently at installa
This circuit breaker is part of the M frame type and includes a trip unit for its interrupting rating. It is designed for a current range of 800 A, weighing 26.68 pounds. The device can endure a mecha
This circuit breaker, part of the I-frame series, is designed for currents up to 220 amperes. It includes both fixed thermal and magnetic protection mechanisms. The rated insulation voltage is set at
The 140G-G3C3-C70 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.42 lb Weight.
The 140G-M6H3-D80 Molded Case Circuit Breaker has a Electronic LSI Protection Type and a 26.68 lb Weight.
The 140G-G2C4-C40 molded case circuit breaker operates at a rated current of 125 Amps and supports a maximum interruption rating of 25 kA. It features a four-pole configuration and fixed thermal and m
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.