140U-J2D3-D22
The 140U-J2D3-D22 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. The rated ope
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4.7
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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-JTD3-D22
The 140U-JTD3-D22 circuit breaker is a thermal-magnetic circuit breaker that has been designed and distributed by Allen-Bradley. This breaker has a rated operational current of 225 Amps and different
In Stock Ships Today
4.9
140U-L3X3
This circuit breaker operates within a thermal magnetic current range of 15 to 800 A and has an electronic current range extending from 70 to 1200 A. It offers significant breaking capacities, includi
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4.6
140U-H3C3-D10
This circuit-breaker handles 3-phase applications with a power dissipation of 20 watts. It features an H-Frame design and is capable of withstanding breaking capacities of up to 30 kA at voltages betw
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4.9
140U-I6C3-D15-S
As a part of the 140U MCB series, this breaker operates within a magnetic tripping range of 800 to 1600 amperes. It is equipped with three poles and offers a horsepower rating of 25 to 30 HP at 230 VA
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4.9
140U-H2C3-C70-A
This circuit breaker has a frame size classified as H Frame and is designed with three poles. It demonstrates an interrupting rating between 20 and 29 KA, suitable for handling significant fault curre
Available
4.5
140U-J3D3-D17
The 140U-J3D3-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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4.9
140U-M5X3
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
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4.6
140U-H6C3-D11
The Allen-Bradley 140U-H6C3-D11 Circuit Breaker is a 140G Molded Case Circuit Breaker which offers circuit protection and load protection. It has an H Frame size and a 3-pole configuration.
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5.0
140U-K6D3-D35
The Allen-Bradley 140U-K6D3-D35 Circuit Breaker is a 140G Molded Case Circuit Breaker (MCCB). It is a K-Frame circuit breaker with a rated current of 350 Amps and 3 poles configuration.
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4.7
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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.