Allen Bradley
140U-H3C3-D12
This molded case circuit breaker includes 3 poles and operates at a frequency range of 50 Hz to 60 Hz. It provides exceptional breaking capacities of 85 kA at 220-240 V, 40 kA at 380-415 V, and 25 kA
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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 140U MCB
Browse available units in our catalog of 140U MCB.
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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
From $3,000Available - Allen Bradley
140UE-M5X3
Featuring a strong M-Frame design, this circuit breaker is rated for operational voltages up to 690V AC and an insulation voltage of 1000 VAC. It boasts impressive interrupting capacities: up to 65 kA
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140U-I3C3-C30
The Allen Bradley 140U-I3C3-C30 Circuit Breaker is a 140U-I Molded Case Circuit Breaker. It is an I-Frame with a 3-pole configuration, a current rating of 30 Amps, a voltage rating of 480 Volts, and a
AvailableCall - Allen Bradley
140U-H6C3-C50-A-MT
The 140U-H6C3-C50-A-MT molded case circuit breaker is available through the Bulletin 140U series by Allen Bradley. The circuit breaker is built with an H frame and it has three poles. The unit has 125
From $2,129Available - Allen Bradley
140U-K6D3-D40-MU
The Allen Bradley 140U-K6D3-D40-MU Circuit Breaker is a 140G Molded Case Circuit Breaker (MCCB). It is a K-Frame circuit breaker with a rated current of 400 Amps and it has a 3 poles configuration.
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140U-JD0D3-D20
This circuit breaker operates within a frequency range of 50 to 60 Hz and uses a thermal magnetic trip unit. The protection system includes fixed thermal and adjustable magnetic features, ensuring rel
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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.
From $434In Stock Ships Today - Allen Bradley
140U-H6C3-C20-A-MT
This model features 3 poles and includes one auxiliary contact. It operates effectively in temperatures from -20°C to 70°C and has storage capabilities between -40°C and 80°C. Designed for use at elev
From $1,892Available - Allen Bradley
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.
From $4,254In Stock Ships Today
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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.