OVERVIEW

Official designation: Allen-Bradley 140U-H2C3-C80 (Bulletin 140U, Molded Case Circuit Breaker)

Role/Application: H-Frame, 3-pole MCCB, providing fixed thermal and fixed magnetic trip protection. It is rated for 80 Amperes continuous current for industrial protection applications.

KEY SPECS SUMMARY

Power: 600 Volts AC maximum

Interfaces / Ports: Bolt connection terminals

Indicators: Trip status flag

Operating Temp: 16 to 140 degrees Fahrenheit

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

Limit: Interrupting rating 25 kA at 480 Volts AC

Lifecycle: Discontinued, replacement 140G-H6F3-C80-KA

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the rated insulation voltage and typical heat dissipation of the 140U-H2C3-C80 breaker?

A: The rated insulation voltage is 750 Volts AC, with heat dissipation typically around 25 Watts.

Wiring & Installation:

Q: What is the general rule regarding the continuous current rating for most circuit breakers in North America?

A: Most North American breakers are 80 percent rated, but 140U MPCBs are 100 percent rated.

Troubleshooting & Compatibility:

Q: What are the key AC and DC voltage ratings for the interrupting capacity of the H-Frame circuit breaker?

A: Interrupting ratings are 25 kA at 480 Volts AC and 10 kA at 125/250 Volts DC.

Replacement & Upgrades:

Q: Is the replacement 140G-H6F3-C80-KA a direct form and fit replacement for the discontinued 140U-H2C3-C80?

A: The 140G-H6F3-C80-KA is an engineering replacement, suggesting potential differences in fit or function.