140U-Q6D3-D60
This circuit breaker incorporates a fixed thermal and adjustable magnetic trip type for effective overload protection. It has impressive interrupting capacities, including 100 kA at 240V AC and 70 kA
Call
4.9
Free UPS Ground on All Orders!
+1 (919) 205-4392
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.
Learn more
Browse 140U MCB
Browse available units in our catalog of 140U MCB.
140U-Q3X3
This circuit breaker operates with a current rating of 600 A and supports 3-pole configurations. It features a rated insulation voltage of 750 VAC (UL/CSA) and 1000 V AC (IEC). The interrupting rating
Call
5.0
140UE-M5D3-D80
Designed for heavy-duty applications, this model features a frame size identified as Frame M and operates at a maximum voltage of 690 V AC. With a breaking capacity of 50 kA, it effectively safeguards
Call
4.7
140U-H6C3-C25-A-MT
This circuit breaker contains three poles and is equipped with a thermal magnetic trip unit. It provides an interrupting capacity of 65 kA at 480 VAC. The device is designed for reliable operation bet
Available
4.8
140U-I3C3-C90
The 140U-I3C3-C90 circuit breaker is a molded case circuit breaker that has been designed to provide motor protection against abnormally high levels of current and short-circuit currents. Its main goa
Call
5.0
140U-I6C3-D12-S
The Allen-Bradley 140U-I6C3-D12-S Circuit Breaker is a 140U Inverse Time Molded Case Circuit Breaker (MCCB) that consists of a 3-pole, I-Frame unit with a continuous current rating of 120 Amps. The ty
Call
4.6
140U-K6G3-D40
The Allen-Bradley 140U-K6G3-D40 Molded Case is a 140G Molded Case Circuit Breaker. It is a K-Frame circuit breaker with a rated current of 400 Amps and 3-pole configuration. It provides Electronic LSG
Call
4.9
140U-LTD3-D30
This molded case circuit breaker supports 3 poles and offers a thermal trip rating set at 300 A. The magnetic trip range is adjustable between 1500 to 3000 A. Designed to operate effectively in enviro
Call
4.7
140U-JD3D3-D17
This circuit breaker features a three-pole design with thermal-magnetic protection capabilities. Its interrupting rating is 35 kA at 480 VAC, making it suitable for high fault current applications. Th
Call
4.6
140U-K3D3-D20
The Allen-Bradley 140U-K3D3-D20 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
Call
4.7
Showing 171-180 of
254
results
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.