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.
The circuit breaker operates at 300 A of rated current and features adjustable thermal and magnetic protection options. It is rated for insulation voltages of up to 1000V and can withstand impulse vol
This molded case circuit breaker operates with control voltages ranging from 110 V to 127 V, both AC and DC. It is rated for maximum operating altitudes of 1000 meters and can function effectively wit
This circuit breaker boasts a current handling capacity of 150 A, ensuring versatile applications. It features a rated insulation voltage of 1000 V and can withstand impulse voltages of up to 8 kV, ma
The 140G-H2C3-C63 Molded Case Circuit Breaker has a Fixed Thermal/ Fixed Magnetic Protection Type and a 2.65 lb Weight.
This molded case circuit breaker has a K frame size and is equipped with a stainless steel flange handle for durability. It operates effectively within a temperature range from 0°C to 40°C and can be
This molded case circuit breaker is classified under the M frame type and addresses applications requiring adjustable thermal and magnetic protection. It can handle a rated current of up to 600 Amps a
This door escutcheon is specifically designed for R Frame installation and supports both 3-Pole and 4-Pole configurations. Rated at IP54, it protects against dust and moisture to a certain extent. The
Designed with four poles, the 140G-G6C4-C60 circuit breaker can manage a thermal trip current of 60 A and a magnetic trip threshold of 600 A. It features a fixed thermal and fixed magnetic protection
Rated for a current range of 90 A, this circuit breaker functions efficiently with a 1000 V insulation voltage and withstands impulse voltages of up to 8 kV. It weighs 5.51 pounds and has a mechanical
This molded case circuit breaker features an interrupting capacity of 65 kA and employs Electronic LSI protection to enhance its response during fault conditions. It supports a rated insulation voltag
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.