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Allen Bradley 140U MCB 140U-H3C3-D10

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140U-H3C3-D10

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The 140U-H3C3-D10 is a molded case circuit-breaker from Allen Bradley's 140U MCB series. This device operates with a current rating of 100 A and is designed for 3-phase systems. Its rated operational voltage is 480 V AC, equipped with a thermal-magnetic trip unit for reliable protection.

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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-H3C3-D10

ManufacturerAllen Bradley
Product TypeMolded Case Circuit-Breaker
Product Line140U MCB
Part Number140U-H3C3-D10
UPC611320842852
Weight2.75 lbs (1.25 kg)
Current100 A
Power Dissipation20 Watts
Phase3-Phase
Number of Poles3-Poles
FrameH-Frame
Rated Operational Voltage480 V AC
Breaking Capacity30 kA @ 380–415 V
MountingPanel mounted
Impulse Withstand Voltage6 kV
Rated Insulation Voltage750 V AC
Frequency50/60 Hz
Connection TypeBolt-on terminals
Trip Unit TypeThermal-magnetic
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The Allen Bradley 140U-H3C3-D10 circuit-breaker is a reliable molded case unit specifically built for protection in electrical distribution systems. It supports a maximum current of 100 A and is structured for 3-phase configurations, accommodating a range of industrial applications. This breaker offers a substantial rated operational voltage of 480 V AC, making it well-suited for different setups.

Its performance is enhanced by a thermal-magnetic trip unit, which effectively responds to overload and short-circuit conditions. The breaker is rated to withstand breaking capacities of up to 30 kA for voltages between 380 and 415 V. This characteristic is vital for ensuring system integrity during fault conditions.

The 140U-H3C3-D10 features an H-Frame design and panel-mounted installation. It is equipped with bolt-on terminals, allowing for secure electrical connections. The circuit-breaker also has an impulse withstand voltage rating of 6 kV, providing extra robustness under transient conditions. Furthermore, it is rated for insulation up to 750 V AC and operates efficiently within a frequency range of 50/60 Hz. Power dissipation for this model is limited to 20 watts, ensuring low thermal loads during normal operation. Overall, the 140U-H3C3-D10 delivers reliable circuit protection, crucial for maintaining electrical system safety.