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Allen Bradley 140U MCB 140U-J3D3-D10

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140U-J3D3-D10

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The Allen-Bradley 140U-J3D3-D10 circuit breaker is a thermal-magnetic circuit breaker that comes with a molded case and a Size J frame. It is part of the Allen-Bradley Bulletin 140U series of circuit breakers and circuit breaker accessories and components. The 140U-J3D3-D10 thermal-magnetic circuit breaker supports interrupting ratings or breaking capacities of 35 kiloamps at 480 Volts and 40 kiloamps at 400 Volts. Its thermal trip threshold is fixed, but its magnetic trip threshold can be adjusted by the users. The 140U-J3D3-D10 thermal-magnetic circuit breaker can operate at temperatures between 0 and 40 degrees Celsius.

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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-J3D3-D10

ManufacturerAllen Bradley
CategoryPLCs
Product Line140U MCB
Part Number140U-J3D3-D10
Weight10.00 lbs (4.54 kg)
Product DescriptionMolded Case Circuit Breaker
Frame SizeJ
Frame Rating250 Amps
No. of Poles3
Interrupting Rating35 Kiloamps
Protection TypeFixed Thermal/Adjustable Magnetic
Rated Operational Voltage400/480 Volts AC
Amperage Rating100 Amps
Frequency Rating50/60 Hertz
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The Allen-Bradley 140U-J3D3-D10 Molded Case Circuit Breaker (MCCB) comes with a size J frame, 3 poles, and 250 Amps of frame current. It has 400 to 480 Volts AC of rated operational voltage, 100 Amps of current, 50/60 Hertz of frequency, and 35 Kiloamps of interrupting rating. The protection type for the circuit breaker is adjustable magnetic and fixed thermal protection. Its approximate shipping weight is 11.4 pounds. This MCCB provides thermal protection for the control panels as well as branch circuits. Thermal protection can be provided through the use of a bimetallic heater element that is similar to overload relays. Its arc chamber draws the generated arc in contacts within a millisecond during the short circuit while letting the contacts open.

The 140U-J3D3-D10 Molded Case Circuit Breaker is a fundamental component for electrical protection with high-current applications that require an adjustable trip setting. Some of the accessories that are available for this breaker include the multi-tap terminal lugs, rotary operators, under-voltage release, shunt release, NFPA 79 operators, and a padlock for the operators. This 140U-J3D3-D10 Circuit Breaker can be installed as a reverse feed breaker due to the physical equipment arrangement in panel boards. For this application, using thermal-magnetic circuit breakers with the interchangeable trip unit is not possible. If the ambient temperature is above 40 degrees Celsius, the breaker could cause nuisance tripping since the breaker will carry less current compared to its ratings. The 140U-J3D3-D10 Molded Case Circuit Breaker can be used to protect both the plant and operators from the damages resulting from an overcurrent. Its contacts ensure rapid opening under overcurrent conditions.