OVERVIEW

Official designation: Allen-Bradley 140U-I0C3-C60 (Bulletin 140U, Molded Case Circuit Breaker)

Role/Application: I-Frame, 3-pole current limiting thermal-magnetic MCCB with a 60 A continuous rating, primarily used for overcurrent and short-circuit protection in industrial motor circuits.

KEY SPECS SUMMARY

Power: 600 Volts AC maximum

Interfaces / Ports: Load and line terminals

Indicators: Trip status flag

Operating Temp: Minus 25 to plus 60 degrees C

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

Limit: Magnetic trip non-adjustable 600 to 1200 Amperes

Lifecycle: Discontinued by manufacturer

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the high interrupting capacity (kAIC) of this 60 Amp I-Frame circuit breaker at 480 Volts AC?

A: The breaker's UL Interrupting Rating is 35 kA at 480 Volts AC, ensuring robust short-circuit protection.

Wiring & Installation:

Q: What type of lugs or terminals are typically supplied with the 140U-I0C3-C60 for wiring?

A: The unit typically comes equipped with standard load side lug terminals for copper wire connections.

Troubleshooting & Compatibility:

Q: What NEMA starter size corresponds to the 60 Amp rating of the 140U-I0C3-C60?

A: This 60 A breaker is suitable for circuits corresponding to NEMA starter Size 2 or Size 3 applications.

Replacement & Upgrades:

Q: What is the current Allen-Bradley product series suggested as a direct replacement for the Bulletin 140U series?

A: The modern replacement product is generally the Allen-Bradley Bulletin 140G or 140UT Molded Case Circuit Breaker series.