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Allen Bradley 140U MCB 140U-QTD3-D45

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140U-QTD3-D45

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The 140U-QTD3-D45 from Allen Bradley is engineered as a molded case circuit breaker, suitable for various electrical applications. This model features a continuous ampere rating of 450 A and operates within a voltage range of 600 VAC, making it reliable for managing electrical loads effectively.

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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-QTD3-D45

ManufacturerAllen Bradley
Product TypeMolded Case Circuit Breakers
Product Line140U MCB
Part Number140U-QTD3-D45
Weight1.81 lbs (0.82 kg)
Frame SizeQ Frame
Number of Poles3 Poles
Continuous Ampere Rating450 A
Protection TypeThermal-Magnetic
Voltage Rating600 VAC
Minimum Frequency50 Hz
Maximum Frequency60 Hz
Interrupting Rating35...65 kA
Trip IndicationPositive Trip-Free Mechanism
Minimum Operating Temperature-25°C
Maximum Operating Temperature60°C
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The Allen Bradley 140U-QTD3-D45 represents a robust choice in the realm of molded case circuit breakers. This device is classified under the 140U MCB series and features a Q frame size for compatibility with various installation requirements. Designed for three-pole configurations, it provides flexibility for multi-phase applications.

Operating continuously at an ampage of 450 A, this breaker is substantial for handling significant electrical loads. With a voltage rating of 600 VAC, it offers a reliable solution for systems operating within this standard range. The thermal-magnetic protection mechanism ensures efficient operation and safeguards against overcurrent conditions.

The 140U-QTD3-D45 functions effectively across frequency thresholds, from a minimum of 50 Hz to a maximum of 60 Hz. Its interrupting capacity is rated between 35 kA and 65 kA, equipping it to handle fault conditions robustly.

With operating temperature limits ranging from -25°C to 60°C, the circuit breaker remains effective in a variety of environmental situations. Further enhancing its functionality is the positive trip-free mechanism, which provides clear trip indications, ensuring that users can easily identify operational status. This design choice not only promotes safety but also contributes to system reliability in critical applications.