OVERVIEW

Official designation: Allen-Bradley 140U-D6D3-B80 (Bulletin 140U, Molded Case Circuit Breaker)

Role/Application: D-Frame, 3-pole MCCB rated 8 Amperes. It provides current-limiting short circuit and overload protection using fixed thermal and fixed magnetic trip mechanisms.

KEY SPECS SUMMARY

Power: 690 Volts AC maximum

Interfaces / Ports: Non-interchangeable lugs

Indicators: Trip status flag

Operating Temp: Minus 40 to plus 80 degrees C

Platform / Compatibility: D-Frame; UL 489, CSA, CE

Limit: Interrupting rating 100 kA at 240 Volts AC

Lifecycle: Discontinued, replacement 140G

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the mechanical lifespan of the 140U-D6D3-B80 circuit breaker?

A: This model has a typical mechanical lifespan of 100,000 operations.

Wiring & Installation:

Q: What is the maximum temperature rating for copper wire used with this current-limiting breaker?

A: The breaker is rated for copper wiring capable of withstanding up to 75 degrees C.

Troubleshooting & Compatibility:

Q: What is the compact footprint size of the D-Frame 140U breaker in millimeters?

A: The typical small footprint is 45 millimeters wide by 102 millimeters high by 85 millimeters deep.

Replacement & Upgrades:

Q: Is the discontinued 140U D-Frame series 100 percent rated at its maximum current capacity?

A: The 140U D-Frame breakers are 100 percent rated up to 10 Amperes.