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 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
Designed to accommodate a frame rating of 250 amperes, this circuit breaker supports a rated operational current of 225 A. It maintains a breaking capacity of 70 kA at 400 volts and 65 kA at 480 volts
This circuit breaker operates with 600 V AC and 250 V DC voltage ratings. The rated thermal trip is fixed thermal, and it employs a thermal-magnetic trip unit. Interrupting ratings for different appli
The Allen Bradley 140U-K0D3-D40 Circuit Breaker is a UL listed 489 listed Molded Circuit Breaker with a K-Frame rating. It has a 100 kilo-Amps (KA) Interrupting Rating at 480 Volts AC and a continuous
The Allen Bradley 140U-I0C3-D15-S Molded Case Circuit Breaker is a 140U Series Molded Case Circuit Breaker (MCCB). It has an I-Frame rated at up to 225 Amps and a 3-pole configuration.
The 140U-K0D3-D20 circuit breaker is a thermal-magnetic circuit breaker that has been designed and distributed by Allen Bradley/Rockwell Automation. This breaker has all the necessary components to pr
This circuit breaker falls under the J-Frame size category and is capable of handling breaking capacities of up to 70 kA at 400/415V AC. It provides breaking capacities of 65 kA at 480V AC, 25 kA at 6
This circuit breaker features a J Frame size and is structured with three poles. Its interrupting capacity is rated at 35 kA at 480V AC. This model utilizes a thermal magnetic trip type, with a magnet
This molded case circuit breaker is designed to handle continuous currents of 225 A. Featuring three poles and a JD-frame size, it offers a rated voltage of 400/480 VAC and has an interrupting capacit
The 140U-J3D3-C90 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
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.