140U-KTD3-D35
This molded case circuit breaker features a three-pole design within a K Frame configuration. It operates reliably in ambient temperatures up to 40°C and supports storage temperatures from -40°C to 80
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4.8
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Allen Bradley 140U MCB
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.
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Browse available units in our catalog of 140U MCB.
140U-D6D2-C12
This molded case circuit breaker features two poles and a robust interrupt rating of 100 A, suitable for handling significant fault currents. Designed for mounting on a DIN rail, it operates effective
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4.9
140U-J3D3-D12
The 140U-J3D3-D12 Molded Case Circuit Breaker is a high-performance compact breaker from Allen-Bradley/Rockwell Automation. It has a size J frame, 3 poles, and 250 Amps of frame current rating. The ra
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4.9
140U-J6G3-D25
This circuit breaker features a J frame size rated at 250 A and operates with three poles. Its interruption capabilities align with IEC standards across multiple voltage ranges, supporting up to 100 k
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4.7
140U-JD6D3-D10
This device is a molded case circuit breaker that provides a rated current of 100 A and operates at a voltage of 600 VAC. It is constructed in a J Frame size and features a thermal magnetic trip type.
Available
4.6
140UE-L5X3
This model features three poles and utilizes a thermal-magnetic trip unit type for reliable operation. It supports a frequency range from 50 Hz to 60 Hz. The device is engineered to function effective
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4.9
140U-H6C3-C30-MB
The 140U-H6C3-C30-MB circuit breaker comes with a trip current rating of 30 Amps. It is an H frame circuit breaker.
Available
5.0
140UE-J4X3
With a breaking capacity ranging from 40 to 49 kA at 400 V, this device ensures reliable circuit protection. It supports thermal-magnetic or electronic trip options and can handle rated operational vo
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4.4
140U-J2D3-D17
The 140U-J2D3-D17 Molded Case Circuit Breaker is a high-performance compact breaker from Allen-Bradley/Rockwell Automation. It has a size J frame, 3 poles, and 250 Amps of frame current rating. The ra
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4.7
140U-D6D2-B10
This circuit breaker belongs to the 140U MCB series and operates with a rated current of 1 Amp across a 60 Hz line frequency. With a robust interrupt rating of 100 kA, it is designed for vertical moun
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5.0
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About 140U MCB
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.