The Allen Bradley 140U MCB series is a series of current-limiting molded-case circuit breakers designed to meet a wide range of safety standards. The 140U circuit breakers are highly compact, and they can be customized with field-installed accessories. These accessories include load terminal covers and feeder terminals. The 140U circuit breakers are suitable for main circuit protection applications and branch circuit protection applications. The interrupting capacity of these breakers ranges from 18 to 100 kA.
Browse available units in our catalog of 140U MCB.
Designed for three-phase applications, the 140U-M5X3 circuit breaker supports a maximum continuous current of 800 Amps. Interrupting capacities are robust, rated at 65 kA for 240 VAC, 50 kA for 480 VA
This molded case circuit breaker supports a rated current of 50A with a thermal trip rating also set at 50A. It exhibits a breaking capacity of at least 100 kA and features a magnetic trip rating of 5
This circuit breaker features a two-pole configuration and belongs to a D frame size. It has a magnetic trip setting between 15 to 20 times the rated current. Designed for high performance, it has a b
This molded case circuit breaker comes equipped with three poles. It operates within a frequency range of 50 to 60 Hz. The device has several breaking capacities, including 200 kA at 220-240 V, 100 kA
The 140U-I3C3-D12-S is an I-frame thermal-magnetic circuit breaker with a non-adjustable magnetic trip. This breaker has been manufactured and designed by Allen Bradley and included in the 2100 combin
The Allen Bradley 140U circuit breaker with the product code 140U-I0C3-C30 is a thermal-magnetic protection device with a non-adjustable magnetic trip. The unit has a magnetic trip range of 500 to 100
This 3-pole circuit breaker is designed with a J frame and offers a minimum magnetic trip current of 800 A and a maximum of 1600 A. It operates effectively in temperatures ranging from -25°C to 60°C,
This circuit breaker features a frame size classified as D and provides an interrupt rating of up to 65 kA. It incorporates fixed thermal and magnetic protection mechanisms for reliable circuit safegu
This molded case circuit breaker operates within a frequency range of 50 Hz to 60 Hz. It has an interrupt rating of 65 kA, making it suitable for high-demand applications. The device is designed for i
The Allen Bradley 140U-K3D3-D30 Circuit Breaker is a UL listed 489 listed Molded Case Circuit Breaker with a K-Frame rating. It has a 35 kilo-Amps (KA) Interrupting Rating at 480 Volts AC and a Contin
The 140U MCB series of molded case circuit breakers from Allen-Bradley/Rockwell Automation features circuit breakers that are listed for global applications. The 140U MCB circuit breakers, like other molded case circuit breakers, are used in a system to provide protection against overcurrents as well as short circuit protection. Note that a short circuit can reach a current of up to 100,000 Amps. To provide reliable protection, molded case circuit breakers have an arc chamber which surrounds the switching contacts. The chamber is made of splitter plates and chutes which help in drawing the arc away from the contacts during a short circuit. An arc is formed by opening the contacts. These breakers provide up to 6 times higher interrupting ratings than other miniature breakers. The Allen-Bradley 140U molded-case circuit breakers also include accessories such as load terminal covers, feeder terminals, eco connection modules, and extension shaft support.
The Allen-Bradley 140U MCB circuit breakers are current limiting circuit breakers that are listed by the Underwriters Laboratories. This series of breakers have a high interrupting capacity and they are suitable for backfeeding at a voltage rating of 240 Volts and 480Y/277V. The 140U MCB series has breakers with a current rating of between 0.5 Amps and 30 Amps. Also, these breakers are available in either 2 or 3 poles. The 140U MCB circuit breakers are 100% rated at up to 10 Amps. The 140U MCB series is compliant with standards such as the CSA C22.2, No.5, IEC/EN 60947-1, IEC/EN 60947-2, and UL 489. Under the UL and the CSA standards, this family of circuit breakers has a rated insulation voltage of 600 Volts. The 140U MCB series has mechanical and electrical lifespans of 100,000 and 10,000 operations, respectively. These circuit breakers have a rated operating ambient temperature of between -40 degrees Celsius and 80 degrees Celsius. One of the benefits of these breakers is that they come with a compact design that consists of a width of 45 millimeters, a height of 102 millimeters, and a depth of 85 millimeters, which help the breakers save panel space.