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 supports a current range of up to 1200 A and is designed with an N frame. It is rated for insulation voltage up to 1000 volts and can tolerate impulse surges of 8 kV. The unit wei
Designed for a current rating of 250 A, this circuit breaker has a rated insulation voltage of 1000 V. Its impulse withstand capability is rated at 8 kV. Weighing in at 5.51 pounds, this molded case c
The Allen Bradley 140G-H0C3-C25 is a part of the 140G MCB series, distinguished by its capability to handle an interrupting rating of 100 kA. This device offers thermal and magnetic protection with a
This molded case circuit breaker functions effectively at 125 Amperes. It can handle up to 160 A within its current range and is configured with four poles. Its protection system is classified as Elec
Designed with electronic LSIG protection, this model is suitable for applications requiring precise load management. The 140G-H15I4-D12 has a current range up to 120 A and is rated for insulation volt
This circuit breaker, with adjustable thermal and magnetic protection, is created to enhance operational safety. It manages a current range of up to 110 A and maintains a rated insulation voltage of 1
Designed with advanced electronic LSI protection, this breaker operates within a current range of 60 amps. It maintains a rated insulation voltage of 1000 volts and is rated for impulse withstands of
This circuit breaker operates within a current range of 100 A and is designed with a rated insulation voltage of 1000 V. It is capable of withstanding impulse voltages of up to 8 kV. Weighing 2.65 pou
This device is categorized under the HC frame type and can withstand a current of 63 A. The rated insulation voltage is set at 1000 V, paired with an impulse withstand voltage of 8 kV, making it suita
This circuit breaker supports a rated insulation voltage of up to 1000 volts and can withstand impulse voltages reaching 8 kV. At a weight of 2.65 pounds, it is designed for mechanical longevity with
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.