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.
Browse available units in our catalog of 140U MCB.
This circuit breaker is characterized by a frame size D and is rated for 30 amperes with three poles. It offers a frequency rating of 50 to 60 Hertz and can withstand current interruptions of 65 kiloa
The Allen Bradley 140U-I6C3-C30-M Circuit Breaker is a UL listed circuit breaker with a fixed thermal and fixed magnetic trip unit. It has a 65 kilo-Amps interrupting rating at 480 Volts AC and a cont
The Allen Bradley 140U-K3X3 Circuit Breaker is a UL489 listed Molded Case Circuit Breaker Frame with a K-Frame rating. It has an Interrupting Rating of 35 kilo-Amps (KA) and a voltage rating of 480 Vo
This circuit breaker operates at a frequency of 50/60 Hz and offers a robust magnetic trip range of 15 to 20 times the rated current (In). With impressive interrupt ratings, it handles 100 kA at 240 V
This model consists of 3 poles and operates on a 3-phase system. It features thermal protection and functions under LI mode, which provides both long-time and instantaneous protection. This breaker co
The 140U-I0C3-C40 circuit breaker designed by Allen Bradley is part of the 140U series and it has three poles. The I Frame device has a continuous current rating of 40 Amps and a magnetic trip range o
This molded case circuit breaker features a rated current of 2 A and is capable of handling either 2 poles or 3 poles. It provides a magnetic trip range of 15-20 A, with a high interrupting capacity f
This circuit breaker is classified as a molded case type, with the ability to handle frequencies of 50/60 Hz. It is equipped with a fixed thermal trip and adjustable magnetic trip mechanism. It suppor
This model features three poles and is built within a D-frame size. It operates at a rated frequency of 60 Hz and provides a high interrupt rating of 100 kA, ensuring safety during fault conditions. T
This breaker features two poles and offers interrupt ratings of 65 kA at both 480Y/277V AC and 240 VAC. Built on a D frame, it supports installation at altitudes up to 1000 m and maintains functionali
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.