140U-J0D3-D12
This circuit breaker is designed with a J frame and supports up to 100 kA of apparent power. It has operating temperature specifications ranging from 0°C to 40°C, and it can withstand storage temperat
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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-I6C3-D12
The Allen-Bradley 140U-I6C3-D12 Circuit Breaker is a 3-pole Molded Case Circuit Breaker (MCCB) with an I-Frame and a current rating of 120 Amps. It is a member of the Allen-Bradley 140U family of inve
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140U-D6D3-C25
This circuit breaker features three poles and operates effectively across a frequency range of 50/60 Hz. It is capable of interrupting faults with a breaking duty of 65 kA at voltages up to 415 V AC.
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5.0
140U-I6C3-C20-M
The Allen-Bradley 140U-I6C3-C20-M Circuit Breaker is a UL listed circuit breaker with a fixed thermal/fixed magnetic trip unit. It has a 65 kA interrupting rating at 480 Volts AC and a continuous curr
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140U-H6C3-C30-MT
The 140U-H6C3-C30-MT circuit breaker has an interrupt rating of 65 kA at 480 Volts AC voltage. It can be used with both single-phase and three-phase power supplies.
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4.6
140U-J3D3-D22
This molded case circuit breaker features three poles and operates with a thermal magnetic trip unit that has a fixed thermal trip setting. It offers significant breaking capacities of 40 kA at 400 V
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5.0
140U-N5L3-E12
The Allen-Bradley Bulletin 140U 140U-N5L3-E12 circuit breaker is an assembled 3-pole circuit breaker with an electronic trip unit. The protection type available on the electronic trip unit is LS (long
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140U-K-RMX
This rotary handle mechanism enables external operation of circuit breakers and is suited for K frame models. The device features LED indicators to show circuit status. It functions effectively within
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140U-K6D3-D30
The Allen-Bradley 140U-K6D3-D30 is 140G Molded Case Circuit Breaker (MCCB). It is a K-Frame circuit breaker with a rated current of 300 Amps.
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140U-KTD3-D40
This molded case circuit breaker from the 140U series has three poles and is built on a K Frame design. The fixed thermal trip mechanism is complemented by an adjustable magnetic trip, providing flexi
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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.