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Allen Bradley 140G MCB 140G-J3F4-D12

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140G-J3F4-D12

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The 140G-J3F4-D12 by Allen-Bradley is a robust molded case circuit breaker tailored for rigorous electrical applications. Rated for 250 amps, this breaker includes adjustable thermal and magnetic protection features and can handle an 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-J3F4-D12

ManufacturerAllen Bradley
Product TypeMolded Case Circuit Breaker
Product Line140G MCB
Part Number140G-J3F4-D12
Weight10.00 lbs (4.54 kg)
FrameJ
Amps250
Interrupting Rating35 kA
Protection TypeAdjust Thermal/ Adjust Magnetic
Poles4
Current Range120 A
Rated Insulation Voltage1000V
Rated Impulse Withstand Voltage8 kV
Mechanical Life240 Operations/hr.
Electrical Life120 Operations/hr.
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The Allen-Bradley 140G-J3F4-D12 serves as a reliable molded case circuit breaker constructed for effective circuit protection. This device operates with a frame classification of J and is rated for a maximum current of 250 amps. With an interrupting rating of 35 kA, it is engineered to withstand significant fault currents.

Featuring adjustable thermal and magnetic protection settings, this circuit breaker is equipped to respond aptly to various fault conditions. It consists of four poles, making it suitable for multi-phase applications. The unit can support a current range of up to 120 amps ensuring it fits diverse operating environments.

This breaker is rated for insulation voltages of 1000 volts, allowing it to function effectively even under high-voltage situations. Additionally, it can withstand impulse voltages up to 8 kV, offering extra safety from transient conditions.

The device weighs 7.72 pounds, balancing durability and ease of handling during installation. The 140G-J3F4-D12 also boasts a mechanical lifespan of 240 operations per hour and an electrical lifespan rated at 120 operations per hour, making it a durable choice for industrial applications.

Revision Part #Also known as
140G-J3F4-D12 Ser A140G-J3F4-D12/A, Series A, Rev A
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