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 operates efficiently in both 50 Hz and 60 Hz environments. It is designed with three poles and rated for a current of 6 Amps, making it suitable for different electrical configura
This MCCB features a J-frame size and consists of three poles. It has an adjustable thermal trip combined with a fixed magnetic trip unit, capable of handling up to 100 kA breaking capacity at its rat
The 140U-J2L3-C50 Molded Case Circuit Breaker is a high-performance compact breaker from Allen Bradley/Rockwell Automation. It has a size J frame, 3 poles, and 250 Amps of frame current rating. The ra
This circuit breaker consists of three poles and employs a thermal-magnetic trip unit. The unit features a fixed thermal trip alongside an adjustable magnetic trip. Installation can be completed using
Designed as part of the 140U MCB series, this molded case circuit breaker has a frame size classified as H. It can interrupt currents up to 10 kA at 480 volts. The device is equipped with a fixed ther
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
The 140U-I3C3-D10 circuit breaker is a thermal-magnetic circuit breaker from the Centerline 2100 protection equipment series. It has been manufactured and distributed by Allen Bradley. Breakers from t
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
This 3-pole molded case circuit breaker features an L Frame size and fixed thermal along with adjustable magnetic trip capabilities. It maintains high performance with an interrupt rating of 65 kA at
The 140U-J2L3-D16 Molded Case Circuit Breaker is a high-performance compact breaker from Allen Bradley/Rockwell Automation. It has a size J frame, 3 poles, and 250 Amps of frame current. The rated ope
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.