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140G-H3F3-D12

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The 140G-H3F3-D12 adjustable thermal/magnetic circuit breaker is an Allen-Bradley/Rockwell Automation adjustable thermal/magnetic circuit breaker from the Bulletin 140G series. It can protect a control panel with a variety of different thermal and magnetic trip ratings that the users can select from depending on their application requirements. The thermal trip ratings supported by the 140G-H3F3-D12 circuit breaker range from 87 to 125 Amps and the supported magnetic trip ratings range from 625 to 1250 Amps. This circuit breaker has 3 poles, back plates, and a Size H frame. The 140G-H3F3-D12 circuit breaker operates with a rated current of 125 Amps.

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Technical specifications for 140G-H3F3-D12

Manufacturer	Eaton Cutler-Hammer
Brand	Eaton Cutler-Hammer
Part Number/Catalog No.	140G-H3F3-D12
Product Type	Molded Case Circuit Breaker
Frame	H
Amps	125
Interrupting Rating	35 kA
Protection Type	Adjust Thermal/ Adjust Magnetic
Current Range	120 A
Rated Insulation Voltage	1000 V
Rated Impulse Withstand Voltage	8 kV
Weight	2.65 lb
Mechanical Life	240 Operations/hr.
Electrical Life	120 Operations/ hr.

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.

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The Allen-Bradley 140G-H3F3-D12 circuit breaker is a 3-pole circuit breaker with a 35 kiloamps interrupting capacity at 480 Volts AC. It is part of the 140G circuit breaker series which uses the thermal/magnetic trip units to offer protection in the 15 to 800 Amps range and the electronic trip units to offer protection in the 10 to 3000 Amps range. The rated current for the 140G-H3F3-D12 circuit breaker is 125 Amps. The breaker uses an adjustable thermal/magnetic trip system. The thermal trip can be configured between 87 and 125 Amps and the magnetic trip can be configured between 625 and 1250 Amps. For 250 to 500 Volts DC, the rated interrupting capacity of the breaker is 50 kiloamps. For AC voltages at 50 to 60 Hertz, the interrupting ratings are 100 kiloamps, 35 kiloamps, and 18 kiloamps at 240 Volts AC, 480 Volts AC, and 600 Volts AC.

The 140G-H3F3-D12 circuit breaker comes in an H Frame enclosure with a rated insulation voltage of 1 kilovolt and with an 8 kilovolts impulse withstand rating. The dimensions of the circuit breaker are 130 millimeters in height, 82.5 millimeters in width, and 90 millimeters in depth. The weight of this 3-pole breaker is 2.65 pounds. The 140G-H3F3-D12 circuit breaker is rated for an electrical life of 8000 operations at 120 operations per hour and at 415 Volts AC operating voltage. The recommended temperature rating of wire to be used with this circuit breaker is 75 degrees Celsius. The temperature of the air surrounding the 140G-H3F3-D12 circuit breaker should not exceed 40 degrees Celsius because, at higher temperatures, the breaker’s output derates.