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 molded case circuit breaker from the 140U series has three poles and is built on a K Frame design. The fixed thermal trip mechanism is complemented by an adjustable magnetic trip, providing flexi
The Allen Bradley 140U-H6C3-C80-A-MT Circuit Breaker is a Molded Case Circuit Breaker (MCCB) under the 140U series. It has an H Frame with a frequency rating of 50 to 60 Hertz and a current rating of
Featuring three poles, the 140U-I6C3-D15 circuit breaker has an interrupting rating of 65 kA at 480V AC. With a thermal magnetic trip unit that includes a fixed thermal element and an adjustable magne
The Allen Bradley 140U-K3D3-D35 Circuit Breaker is a UL listed 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 Contin
The Allen Bradley 140U-H6C3-C70-B Circuit Breaker is a Molded Case Circuit Breaker (MCCB) in the 140G Circuit Breaker family. It has a rated current of 70 Amps and a 3-pole configuration. The circuit
The Allen Bradley 140U-I6C3-C30 Circuit Breaker is a UL listed circuit breaker with a fixed thermal and fixed magnetic trip unit. It has a 65 kiloAmps interrupting rating at 480 Volts AC and a continu
The Allen Bradley 140U-I6C3-D12 Circuit Breaker is a 3-pole Molded Case Circuit Breaker (MCCB) with an I-Frame and a current rating of 120 Amps. It is a member of the Allen Bradley 140U family of inve
The Allen Bradley 140U-K6D3-D20 Circuit Breaker is a 140G Molded Case Circuit Breaker. It is a K-Frame circuit breaker with a rated current of 200 Amps and a 3-pole configuration.
This circuit breaker is designed with a J frame and supports up to 100 kA of apparent power. It has operating temperature specifications ranging from 0°C to 40°C, and it can withstand storage temperat
The Allen Bradley Bulletin 140U 140U-N5L3-E12 circuit breaker is an assembled 3-pole circuit breaker with an electronic trip unit. The protection type available on the electronic trip unit is LS (long
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.