140U-QTD3-D45
This circuit breaker has a Q frame size and offers three poles for versatile connectivity. It has a thermal-magnetic protection type for dependable operation. Rated for frequencies from 50 Hz to 60 Hz
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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-K3D3-D12
The Allen-Bradley 140U-K3D3-D12 Circuit Breaker is a UL listed and 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 co
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4.9
140U-JD3D3-D10
This circuit breaker features three poles and has a breaking capacity of 35 kA. It operates effectively at frequencies ranging from 50 to 60 Hz and can withstand operational temperatures between -25°C
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5.0
140U-JD3D3-D12
This circuit breaker operates with three poles and can handle frequencies from 50 Hz to 60 Hz. It is suitable for environments with operating temperatures ranging from -25°C to 60°C and can be stored
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4.9
140U-JD3D3-D25
This 3-pole circuit breaker features a thermal-magnetic protection system. It includes a fixed thermal trip element and an adjustable magnetic trip for precise control. Interruption ratings are 35 kA
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4.7
140U-L3D3-D25
This circuit breaker is an L-Frame model configured with three poles. It provides thermal-magnetic protection, utilizing a fixed thermal trip element alongside an adjustable magnetic trip. The unit su
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4.6
140U-K0D3-D12
The 140U-K0D3-D12 circuit breaker is a K-frame circuit breaker that has been designed to protect any industrial process with electrical circuits and different kinds of connections among the equipment.
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140U-JD0D3-D22
This three-pole circuit breaker is designed for operation at voltages up to 480 V and offers a breaking capacity of 100 kA. It operates efficiently within a temperature range of -20°C to 60°C. Further
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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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140U-LTD3-D40
This circuit breaker has three poles and provides robust protection with a breaking capacity of 35 kA at 480V. It can operate within a frequency range of 50 Hz to 60 Hz. The 140U-LTD3-D40 is built to
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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.