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Allen Bradley 140U MCB 140U-M5X3

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140U-M5X3

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The 140U-M5X3 is a circuit breaker from Allen Bradley's 140U MCB series. Capable of handling a maximum input current of 800 Amps, this 3-pole device operates with a voltage rating of up to 600 VAC. It features a thermal magnetic trip unit and supports a push-to-trip mechanism for convenience.

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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-M5X3

ManufacturerAllen Bradley
Product TypeCircuit Breaker
Product Line140U MCB
Part Number140U-M5X3
Weight15.00 lbs (6.80 kg)
Maximum Input Current800 Amps
Poles3 Poles
Voltage Rating600 VAC
Phase3 Phase
Push To TripSupported
Trip UnitThermal Magnetic
Interrupting Capacity at 240 VAC65 kA
Interrupting Capacity at 480 VAC50 kA
Interrupting Capacity at 600 VAC25 kA
Interrupting Capacity at 250 VDC22 kA
Operating Temperature32 to 104 degrees Fahrenheit
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The Allen Bradley 140U-M5X3 is a reliable circuit breaker designed for substantial electrical systems. This device accommodates a maximum input current of 800 Amps and is structured with three poles for effective control in three-phase setups. It operates safely at a voltage rating of up to 600 VAC, making it versatile for a variety of industrial applications. The breaker integrates a thermal magnetic trip unit, providing efficient response to overcurrent conditions, while the push-to-trip feature enhances its operational convenience.

An impressive interrupting capacity gives the 140U-M5X3 significant protective capabilities. At 240 VAC, it can handle up to 65 kA, further extending to 50 kA at 480 VAC and 25 kA when at 600 VAC. For applications utilizing direct current, this breaker achieves a rating of 22 kA at 250 VDC, making it suitable for a diverse range of environments.

This circuit breaker is designed to function optimally within an operating temperature range of 32 to 104 degrees Fahrenheit, ensuring reliable performance in typical industrial conditions.