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Allen Bradley 140G MCB 140G-JTF3-D22
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140G-JTF3-D22

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The Allen-Bradley/Rockwell Automation 140G-JTF3-D22 trip unit is an adjustable thermal/magnetic circuit breaker trip unit with a molded case. It is available through the Allen-Bradley Bulletin 140G circuit breaker series. The 140G-JTF3-D22 thermal/magnetic trip unit supports thermal trip ratings of 157.5 to 225 Amps and magnetic trip ratings of 1125 to 2250 Amps. The users can select different trip ratings depending on the requirements of their systems and applications. The 140G-JTF3-D22 thermal/magnetic trip unit is equipped with 3 poles and with bolt-on type end cap terminals.

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Technical specifications for 140G-JTF3-D22

ManufacturerEaton Cutler-Hammer
BrandEaton Cutler-Hammer
Part Number/Catalog No.140G-JTF3-D22
Product TypeMolded Case Circuit Breaker
FrameJC
Amps250
Interrupting RatingTrip Unit
Protection TypeAdjust Thermal/ Adjust Magnetic
Current Range220 A
Rated Insulation Voltage1000V
Rated Impulse Withstand Voltage8 kV
Weight5.51 lb
Mechanical Life240 Operations/hr.
Electrical Life120 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.

The 140G-JTF3-D22 circuit breaker is a molded case circuit breaker from Allen-Bradley/Rockwell Automation. It belongs to the Allen-Bradley 140G series. Breakers in this family can be used in industrial environments with an ambient temperature below 0 degrees Celsius. However, use at temperatures below 0 degrees Celsius is based on the absence of freezing water in the operating environment. Therefore, while interfacing the 140G-JTF3-D22 circuit breaker with applications at a temperature below 0 degrees Celsius, the possibility of ice forming on or within the molded case circuit breaker and causing undesirable effects on the external and internal operating functionalities must be considered. Since the Allen-Bradley/Rockwell Automation 140G-JTF3-D22 circuit breaker uses a thermal/magnetic trip unit to provide protection, its operation is affected by the ambient temperature. The 140G-JTF3-D22 circuit breaker has a maximum operating temperature rating of 40 degrees Celsius. However, at a temperature below this rating, the breaker can carry more current than its normal current rating.

While it is unlikely the 140G-JTF3-D22 circuit breaker will exhibit any nuisance tripping at lower temperatures, closer protection coordination must be ensured to cater to the additional current. Note that at higher temperatures, the 140G-JTF3-D22 circuit breaker and other molded case circuit breakers are capable of carrying less current than their rated continuous current. Also, higher temperatures open the 140G-JTF3-D22 circuit breaker up for nuisance thermal tripping. The Allen-Bradley 140G-JTF3-D22 circuit breaker has an operating altitude of 2000 meters above sea level maximum. However, if the breaker is going to be operated at an altitude of over 2000 meters above sea level, it must be derated for interrupting rating and voltage. This is because the thinner air at higher altitudes reduces the cooling and dielectric characteristics of the breaker compared to the denser air at low altitudes.

Revision Part #Also known as
140G-JTF3-D22 Ser A140G-JTF3-D22/A, Series A, Rev A
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