OVERVIEW

Official designation: Allen-Bradley 140U-D6D3-C15 (Bulletin 140U, Molded Case Circuit Breaker)

Role/Application: D-Frame circuit breaker providing fixed thermal and fixed magnetic overcurrent protection for industrial low-voltage power distribution and branch circuits.

KEY SPECS SUMMARY

Power: 690 Volts AC maximum operational voltage

Interfaces / Ports: Load and line terminals

Indicators: Internal trip mechanism

Operating Temp: Minus 25 to plus 60 degrees C

Platform / Compatibility: D-Frame; DIN rail or panel mounting

Limit: 15 Amperes rated current

Lifecycle: Discontinued by manufacturer

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the primary short circuit protection ratings (Icu and Ics) at 400 to 415 Volts AC?

A: The ultimate breaking capacity is 65 kA Icu and the service breaking capacity is 50 kA Ics.

Wiring & Installation:

Q: What are the dimensions of the D-Frame breaker for installation and panel space planning?

A: The dimensions are 102 millimeters high, 45 millimeters wide, and 85 millimeters deep.

Troubleshooting & Compatibility:

Q: What is the specific fixed magnetic trip range multiplier for the 140U-D6D3-C15 at its 15 Amp rating?

A: The fixed magnetic trip activates between 15 to 20 times the rated current (In), which is 225 to 300 Amperes.

Replacement & Upgrades:

Q: What is the recommended replacement product for the discontinued 140U-D6D3-C15 circuit breaker?

A: The current replacement part number is 140UT-D7D3-C15. Refer to the latest manufacturer manual.