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Allen Bradley 140U MCB 140U-K6X3

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140U-K6X3

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The 140U-K6X3 is a molded case circuit breaker designed by Allen Bradley in the 140U MCB series. With a rated current of 400 A, this device features three poles and utilizes a fixed trip unit for reliable operation. It also includes various accessory supports, making it suitable for diverse applications.

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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 140U-K6X3

ManufacturerAllen Bradley
Product TypeMolded Case Circuit Breaker
Product Line140U MCB
Part Number140U-K6X3
UPC611320843767
Weight8.75 lbs (3.97 kg)
Rated Current400 A
Number of Poles3 poles
Trip Unit TypeFixed
Accessory SupportAux, alarm, shunt, UV release
Protection TypeThermal-Magnetic
Operating MechanismRotary
Rated Frequency50/60 Hz
Mounting StyleFixed
Rated Voltage (Max)690 VAC
Compliance StandardUL 489
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The Allen Bradley 140U-K6X3 functions as a molded case circuit breaker within the 140U MCB series. This circuit breaker has a current rating of 400 A and is configured with three poles, making it ideal for industrial applications requiring reliable circuit protection. It features a safety trip unit, which is fixed, ensuring consistent performance.

Designed to provide thermal and magnetic protection, this device safeguards electrical systems from overloads and short circuits. The rotary mechanism allows for straightforward operation. Its maximum rated voltage is 690 VAC, accommodating various voltage levels within industrial settings.

Additional functionality comes from support for various accessories, including auxiliary contacts, alarms, shunts, and undervoltage release options. Mounting is fixed, which assures stability during operation. Operating at frequencies of 50 or 60 Hz, the 140U-K6X3 is compliant with UL 489 standards, ensuring adherence to recognized safety regulations for molded case circuit breakers.