OVERVIEW

Official designation: Allen-Bradley 140U-I6C3-D10 (Bulletin 140U, Molded Case Circuit Breaker)

Role/Application: I-Frame, 3-pole inverse-time thermal-magnetic MCCB with a fixed 100 A continuous rating, designed for short-circuit and overload motor protection up to 50 HP.

KEY SPECS SUMMARY

Power: 600 Volts AC maximum

Interfaces / Ports: Load and line lugs

Indicators: Trip status flag

Operating Temp: Minus 25 to plus 60 degrees C

Platform / Compatibility: I-Frame; UL 489, CSA, IEC 60947-2

Limit: 100 Amperes rated continuous current

Lifecycle: Discontinued by manufacturer

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the short-circuit Interrupting Rating (kAIC) of the 140U-I6C3-D10 at 480 Volts AC?

A: The breaker has a high Interrupting Rating of 65 kA at 480 Volts AC.

Wiring & Installation:

Q: What is the proper tightening torque for the line and load terminal connections?

A: Refer to the latest manufacturer manual for specific torque requirements for the terminal connections.

Troubleshooting & Compatibility:

Q: What is the maximum motor horsepower rating supported by this 100 Amp breaker at 460 Volts AC?

A: This breaker supports a maximum motor rating of 40 HP at 460 Volts AC.

Replacement & Upgrades:

Q: What is the suggested current replacement series for the discontinued Bulletin 140U MCCB line?

A: The recommended replacement is the Allen-Bradley Bulletin 140G Molded Case Circuit Breaker series.