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OVERVIEW
Official designation: Allen-Bradley 140U-D6D3-C12 (Bulletin 140U, Molded Case Circuit Breaker)
Role/Application: D-Frame, 3-pole current-limiting breaker for feeder and branch circuits, providing fixed thermal and fixed magnetic short-circuit protection in industrial applications.
KEY SPECS SUMMARY
Power: 600 Volts AC maximum
Interfaces / Ports: Load and line terminals
Indicators: Internal trip status
Operating Temp: Minus 25 to plus 60 degrees C
Platform / Compatibility: D-Frame; DIN rail mountable
Limit: 12 Amperes rated current
Lifecycle: Discontinued by manufacturer
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What is the primary Interrupting Rating (kAIC) for the 140U-D6D3-C12 breaker?
A: The typical Interrupting Rating is 65 kA at 480Y/277 Volts AC.
Wiring & Installation:
Q: What are the typical dimensions (Width x Height x Depth) of the compact D-Frame 140U breaker?
A: The typical small footprint is 45W x 102H x 85D millimeters saving panel space.
Troubleshooting & Compatibility:
Q: What is the Magnetic Trip setting range for the 12 Amp rated 140U-D6D3-C12?
A: The fixed magnetic trip is set between 15 and 20 Amperes.
Replacement & Upgrades:
Q: What is the direct product family replacement for the discontinued 140U-D6D3-C12 model?
A: The recommended upgrade is the newer Bulletin 140UT product line, such as 140UT-D7D3-C12.
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| Model Name | See this page for details |
| Certification or Licensing Information Required by Law | See this page for details |
| 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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