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.
The 140U-D6D3-C20 circuit breaker operates at a supply voltage of 480V and is configured with three poles. With an interrupt rating of 65 kA, it effectively manages fault conditions. This device is de
The 140U-I0C3-C60 circuit breaker with a thermal magnetic/non-adjustable magnetic trip and an I Frame is designed by Allen Bradley and part of the 140U product series. The unit has a magnetic trip cur
This circuit breaker is equipped with three poles and a magnetic trip range from 500 to 1,200 Amperes. It is classified as a 1-phase device and has a fixed thermal magnetic trip unit for reliable perf
This circuit breaker meets the stringent UL, CSA, and CE standards and is classified as a thermal magnetic trip type. It is designed for use in three-phase systems and can function within a frequency
The 140U-J6D3-D20 circuit breaker comes with the fixed thermal and adjustable magnetic trips. It has a current rating of 200 Amps.
The 140U-H6C3-C15-A circuit breaker is a 480 Volts AC circuit breaker. It can be operated at an altitude of up to 2000 meters above sea level.
The 140U-I6C3-C20 circuit breaker is a thermal-magnetic circuit breaker that has been designed and distributed by Allen Bradley. This breaker is intended to operate alongside a starter and to be attac
The Allen Bradley 140U-I3C3-C20 Circuit Breaker is a 140G Series Molded Case Circuit Breaker (MCCB). It is an I-Frame circuit breaker with an amperage rating of 20 Amps, a voltage rating of 600 Volts,
This circuit breaker has a frame size classified as H Frame and is designed with three poles. It demonstrates an interrupting rating between 20 and 29 KA, suitable for handling significant fault curre
The Allen Bradley 140U-K6D3-D35 Circuit Breaker is a 140G Molded Case Circuit Breaker (MCCB). It is a K-Frame circuit breaker with a rated current of 350 Amps and 3 poles configuration.
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.