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Allen Bradley 140G MCB 140G-J3X4

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140G-J3X4

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The 140G-J3X4 is a molded case circuit breaker from Allen-Bradley, part of the Rockwell Automation lineup. This unit features a J frame and is rated for 250 amps, delivering effective circuit protection with a substantial interrupting capacity of 35 kA.

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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 140G-J3X4

ManufacturerAllen Bradley
Product TypeMolded Case Circuit Breaker
Product Line140G MCB
Part Number140G-J3X4
Weight3.00 lbs (1.36 kg)
FrameJ
Amps250
Interrupting Rating35 kA
Protection TypeBreaker Frame
Poles4
Current RangeFrame Only
Rated Insulation Voltage1000V
Rated Impulse Withstand Voltage8 kV
Mechanical Life240 Operations/hr.
Electrical Life120 Operations/hr.
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The Allen-Bradley 140G-J3X4 is built to provide reliable circuit protection within industrial settings. With a maximum current rating of 250 amps and a J frame design, this molded case circuit breaker exhibits robust performance characteristics. Its interrupting rating stands at 35 kA, making it suitable for managing fault currents effectively.

The unit features four poles, allowing it to be used in a range of applications, particularly those requiring multiple connections. The breaker is designed with fixed insulation voltage capabilities, maintaining operation at 1000 volts while offering resistance to impulse voltages up to 8 kV. These attributes are essential for systems facing electrical stress and surges.

Weighing 7.72 pounds, the 140G-J3X4 is manageable yet sturdy enough for regular use. It has a mechanical operational life rated at 240 operations per hour, while its electrical life is rated at 120 operations per hour, ensuring longevity in demanding environments. This combination makes the 140G-J3X4 a solid choice for reliable electrical circuit management.

Revision Part #Also known as
140G-J3X4 Ser A140G-J3X4/A, Series A, Rev A
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