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Allen Bradley 140U MCB 140U-L3D3-D40

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140U-L3D3-D40

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The 140U-L3D3-D40 is a molded case circuit breaker produced by Allen Bradley, capable of handling a rated current of 400 A. Designed for use at 600 VAC, this unit is ideal for industrial applications requiring robust protection and reliability.

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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-L3D3-D40

ManufacturerAllen Bradley
Product TypeMolded Case Circuit Breaker
Product Line140U MCB
Part Number140U-L3D3-D40
Weight15.00 lbs (6.80 kg)
UPC662074298518
Rated Current400 A
Rated Voltage600 VAC
Protection TypeThermal Protection
Number of Poles3 Poles
Phase Type3 Phase
FunctionLI - Long-Time and Instantaneous
Connection TypeBolt on Connection
AIC Rating35 kA at 480 V
Installation Altitude1000 m
Operating Humidity80% (Non-Condensing)
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The Allen Bradley 140U-L3D3-D40 is a reliable molded case circuit breaker tailored for industrial applications. It boasts a rated current of 400 A and operates at a rated voltage of 600 VAC, making it suitable for robust electrical systems. Designed with thermal protection, this circuit breaker ensures safety by offering long-time and instantaneous protection through its LI function.

This breaker consists of 3 poles and supports a 3-phase connection type, accommodating varying system requirements. The connection type is a bolt-on connection, which facilitates secure integration into electrical installations. With an AIC rating of 35 kA at 480 V, it is engineered to handle fault currents effectively, enhancing its performance under severe electrical conditions.

The installation of the 140U-L3D3-D40 can occur at altitudes reaching 1000 meters, providing versatility for diverse environments. It remains operational in conditions of up to 80% humidity without condensation, ensuring longevity and stable operation in challenging atmospheres. Overall, this circuit breaker stands out for its effectiveness in safeguarding electrical systems under demanding circumstances.