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Allen Bradley 140U MCB 140U-L3D3-D25

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140U-L3D3-D25

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The Allen Bradley 140U-L3D3-D25 is a robust molded case circuit breaker designed to safeguard electrical circuits. It features a current rating of 250 A and has a voltage rating of up to 600V AC, making it suitable for high-demand applications.

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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-D25

ManufacturerAllen Bradley
Product TypeMolded Case Circuit Breaker
Product Line140U MCB
Part Number140U-L3D3-D25
Weight32.00 lbs (14.51 kg)
Frame SizeL-Frame
Number of Poles3 Poles
Current Rating250 A
Voltage Rating (UL/CSA)600V AC
Interrupting Rating at 480 V35 kA
Interrupting Rating at 240 V65 kA
Protection TypeThermal-Magnetic
Thermal Trip ElementFixed Thermal
Magnetic Trip ElementAdjustable Magnetic
Minimum Frequency50 Hz
Maximum Frequency60 Hz
Phase Type3 Phase
Mounting OrientationVertical or Horizontal
Connection TypeBolt-On / Standard Bus Bar Mount
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The 140U-L3D3-D25 circuit breaker from Allen Bradley is formulated for strength and reliability in electrical systems. Operating with a current capacity of 250 A, this molded case circuit breaker is rated for a maximum voltage of 600V AC. The device's L-Frame design accommodates three poles, making it suitable for three-phase applications.

With an impressive interrupting capacity of 35 kA at 480 V and 65 kA at 240 V, it effectively manages fault conditions, mitigating potential damage to electrical components. The protection mechanism is thermal-magnetic in nature, featuring a fixed thermal trip for consistent performance along with an adjustable magnetic trip element. This allows for tailored settings based on specific operational needs.

This circuit breaker functions well within a frequency range of 50 to 60 Hz, ensuring compatibility with standard electrical systems. It can be mounted in both vertical and horizontal orientations, providing flexibility in installation. The bolt-on connection type allows for easy integration with standard bus bars, ensuring a secure fit within electrical panels. The 140U-L3D3-D25 circuit breaker offers solid performance and adaptability for robust electrical management.