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Allen Bradley 140U MCB 140U-LTD3-D40

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140U-LTD3-D40

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The 140U-LTD3-D40 circuit breaker from Allen Bradley belongs to the 140U MCB series. This device is characterized as a molded case circuit breaker equipped with an electronic trip unit and is framed in an L size. It operates effectively at a voltage rating of 600 VAC (UL/CSA) and 690 VAC (IEC), supporting a current rating of 400 A.

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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-LTD3-D40

ManufacturerAllen Bradley
Product TypeMolded Case Circuit Breaker
Product Line140U MCB
Part Number140U-LTD3-D40
Weight1.38 lbs (0.62 kg)
Frame SizeL Frame
Component TypeElectronic Trip Unit
Number of Poles3 Poles
Voltage Rating (UL/CSA)600 VAC
Current Rating400 A
Voltage Rating (IEC)690 VAC
Breaking Capacity (at 480V)35 kA
Minimum Frequency50 Hz
Maximum Frequency60 Hz
Minimum Operating Temperature-40°C
Maximum Operating Temperature80°C
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The Allen Bradley 140U-LTD3-D40 is classified as a molded case circuit breaker, designed for reliable circuit protection. It features a sturdy L frame size and incorporates an electronic trip unit for precise fault detection and response. This model supports 3 poles, making it suitable for multi-phase systems and various applications.

The voltage rating complies with UL and CSA standards at 600 VAC, while it meets IEC requirements at 690 VAC. The circuit breaker handles a maximum current of 400 A. It also has a significant breaking capacity of 35 kA at 480V, making it capable of interrupting high fault currents.

Operational frequency for this device ranges from 50 Hz to 60 Hz. It has been engineered to endure operating temperature extremes, functioning effectively in temperatures as low as -40°C and as high as 80°C. With these specifications, the 140U-LTD3-D40 is well-equipped to protect electrical systems in diverse and challenging environments.