140U-Q3D3-D60
This device supports three poles and operates efficiently within a continuous current limit of 600 A. It is rated for operational voltages of 600 VAC per UL/CSA standards and 690 VAC following IEC spe
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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.
140UE-L3X3
This three-pole circuit breaker is designed for robust performance with a breaking capacity of 35 kA at 415 V AC. With an L frame size, it operates within a frequency range of 50 to 60 Hz. The IP20-ra
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4.7
140U-I3C3-C50
The Allen-Bradley 140U-I3C3-C50 Molded Case Circuit Breaker is a 140U Series Molded Case Circuit Breaker (MCCB). It is an I-Frame circuit breaker with a current rating of 50 Amps and it has a 3-pole c
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5.0
140U-JD3D3-D20
This molded case circuit breaker has a JD-frame size and features a thermal magnetic trip unit, which provides a fixed thermal trip and an adjustable magnetic trip setting. It can handle a maximum int
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4.6
140U-K3L3-D40
The Allen-Bradley 140U-K3L3-D40 Circuit Breaker is a UL 489 listed Molded Case Circuit Breaker with a K-Frame. It has a 35 kilo-Amps (KA) Interrupting Rating at 480 Volts AC and a Continuous Current R
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140U-L6G3-D60
The Allen-Bradley 140U-L6G3-D60 Molded Case Circuit Breaker comes with a Size L frame, 3 poles, and 600 Amps of frame current rating. It has 690/600 Volts AC of rated operational voltage, 600 Amps of
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4.6
140U-L6D3-D60
This 3-pole molded case circuit breaker features an L Frame size and fixed thermal along with adjustable magnetic trip capabilities. It maintains high performance with an interrupt rating of 65 kA at
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4.7
140UT-D7D3-C20
This circuit breaker operates at a voltage rating of 480Y/277 VAC and is suitable for both 50 Hz and 60 Hz frequencies. It utilizes a thermal-magnetic trip type with a fixed adjustment method and conf
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5.0
140U-J3D3-C90
The 140U-J3D3-C90 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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140U-L-EOPD
This accessory operates at a control voltage range of 110 to 240 V AC/DC. It provides both auto and manual operation modes, allowing for local control via a pushbutton interface. The device includes h
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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.