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 K frame circuit breaker accommodates a rated current of 300 A and operates with three poles. It boasts an interrupting rating of 65 kA at a voltage of 480 VAC and can handle operating voltages up
This circuit breaker operates with a current rating of 160 Amps and includes adjustable thermal and magnetic protection technology. It is rated for up to 1000 Volts of insulation voltage and can withs
This circuit breaker features an electronic LSI protection type and supports a current range of 120 Amps. With a rated insulation voltage of 1000 V and an impulse withstand capability of 8 kV, it ensu
Designed with an HC frame, the 140G-HC6C3-C60 circuit breaker supports a current range of 60 Amps. It has a rated insulation voltage of 1000V and withstands impulse voltages up to 8 kV. Weighing 2.65
The 140G-G3C4-C63 circuit breaker is designed for effective performance in demanding applications. With a rated insulation voltage of 800 V and an impulse withstand voltage of up to 8 kV, this device
The 140G-G3C4-C25 is a molded case circuit breaker with a G frame, rated for 125 Amps. It has a fixed thermal and fixed magnetic protection type, functioning efficiently with a 25 Amp current range. T
This four-pole circuit breaker has fixed thermal and fixed magnetic protection. It operates within a current range of 80 A, along with thermal and magnetic trip settings of 80 A and 800 A, respectivel
The 140G-G6C3-D11 is a G-frame molded case circuit breaker with a thermal trip rating of 110 A and a magnetic trip rating set at 1100 A. Its 125 Amp capability supports a current range of 110 A, and i
This circuit breaker has a current rating of 50 Amps, a maximum current of 250 Amps, and a rated insulation voltage of 1000 Volts. It also withstands impulse voltages reaching 8 kV. It guarantees effi
This model features an electronic LSI protection type and operates with a current range of 60 Amps. It supports a rated insulation voltage of 1000V and can withstand impulse voltages up to 8 kV. The p
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.