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OVERVIEW
Official designation: Allen-Bradley 140UE-JTF3-D20 (Bulletin 140UE, Molded Case Circuit Breaker Trip Unit)
Role/Application: This 3-pole adjustable thermal-magnetic trip unit is part of the 250A J-frame MCCB, providing essential overload, short-circuit, and switching protection for industrial motor branch circuits.
KEY SPECS SUMMARY
Power: 400 Volts AC
Interfaces / Ports: Internal to MCCB
Indicators: N/A
Operating Temp: Refer to the latest manufacturer manual.
Platform / Compatibility: Bulletin 140UE J-frame
Limit: Rated current 200 Amps
Lifecycle: Discontinued
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What type of overload and short-circuit protection is provided by the JTF trip unit?
A: The JTF model provides adjustable thermal overload protection and adjustable magnetic short-circuit protection.
Wiring & Installation:
Q: What is the rated current for the 140UE-JTF3-D20 trip unit?
A: The rated permanent current is 200 Amps, fitting within a 250A J-frame breaker.
Troubleshooting & Compatibility:
Q: Is this 140UE-JTF3-D20 a complete circuit breaker or a component?
A: It is an IEC-rated trip unit component designed for installation into a compatible 140UE J-frame breaker frame.
Replacement & Upgrades:
Q: What is the recommended product series to replace the Bulletin 140UE trip units?
A: The likely replacement series is the Allen-Bradley Bulletin 140G or 140G2 MCCB family.
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| Model Name | See this page for details |
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| Country of Manufacture or Origin | See this page for details |
| Manufacturer | See this page for details |
| After-sales Service Contact or Customer Support Number | See this page for details |
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