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Allen Bradley 140U MCB 140U-K3D3-D40

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140U-K3D3-D40

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The Allen-Bradley 140U-K3D3-D40 Circuit Breaker is a UL listed and 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 Continuous Current Rating of 400 Amps.

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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-K3D3-D40

ManufacturerAllen Bradley
CategoryPLCs
Product Line140U MCB
Part Number140U-K3D3-D40
Weight11.00 lbs (4.99 kg)
DescriptionUL Molded Case Circuit Breaker
FrameK
Current Rating400 Amps
Interrupting Rating35 Kilo-Amps
Protection TypeFixed Thermal/AdjustableMagnetic Trip Unit
Number of Poles3
Rated Operating Voltage480 Volts AC
Type of ControlToggle Lever
TerminalsEnd Cap Bolt-On
Operating Temperature-8 to 60 Degrees Celsius
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The Allen-Bradley 140U-K3D3-D40 UL Molded Case Circuit Breaker is an automatically operated electrical device that is designed to provide protection from short-circuit or thermal overload situations. This K-Frame circuit breaker is used in most industrial control panel applications, and its compact design makes it uniquely fit for applications with limited space. The 140U-K3D3-D40 Circuit Breaker supports back-feeding at 240 and 480 Volts AC input voltage, and it is suitable for HACR, high-intensity discharge, feeder circuit, and control circuit applications. The 140U-K3D3-D40 Circuit Breaker is a 3-pole circuit breaker with an operating voltage rating of 480 Volts AC and a maximum trip rating of 400 Amps. It has a maximum breaking capacity rating of 35 Kilo-Amps (KA) at 480 Volts AC, and it has an insulation rating of 750 Volts.

The 140U-K3D3-D40 Circuit Breaker has a rated mechanical lifespan of about 100,000 operations and an electrical lifespan of 10,000 operations. The 140U-K3D3-D40 Circuit Breaker has both a magnetic and a thermal trip unit that comprises a quick make/break contact, a lever mechanism, a bimetallic element, and an electromagnetic coil with an adjustable trip setting. The thermal overload protection is provided through the bimetallic element and the instantaneous over current protection is provided via the electromagnetic coil. The 140U-K3D3-D40 Circuit Breaker has an adjustable magnetic trip rating of 2000 Amps to 4000 Amps and a fixed thermal trip rating of 400 Amps. The 140U-K3D3-D40 Circuit Breaker has standard bolt-on screw terminals, and it has an open style enclosure design. It has a factory rated operating temperature range of -8 degrees Celsius to 60 degrees Celsius, and it has a rated maximum operating altitude of 2000 meters without de-rating.