OVERVIEW

Official designation: Allen-Bradley 140U-H6C3-C20 (Bulletin 140U, Molded Case Circuit Breaker)

Role/Application: This 3-pole H-frame MCCB provides fixed thermal and magnetic protection for industrial circuits, rated for 20 Amps and certified to UL, CSA, and CE standards.

KEY SPECS SUMMARY

Power: 600V AC rated voltage

Interfaces / Ports: Three power poles

Indicators: Refer to the latest manufacturer manual.

Operating Temp: 0 to 40 degrees C

Platform / Compatibility: Bulletin 140U H-frame

Limit: 65 kA IC at 480V AC

Lifecycle: Discontinued

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum short-circuit interrupting capacity for this MCCB at 480 Volts AC?

A: The interrupting capacity (IC) for this H6-rated breaker is 65 kA at 480 Volts AC.

Wiring & Installation:

Q: Does the 140U-H6C3-C20 require any special accessories for standard wire connections?

A: Terminal lugs must be properly sized and purchased separately for installation onto the breaker terminals.

Troubleshooting & Compatibility:

Q: What type of trip unit protection does the C in the catalog number 140U-H6C3-C20 indicate?

A: The C indicates a non-interchangeable trip unit with fixed thermal and fixed instantaneous settings.

Replacement & Upgrades:

Q: Is this Bulletin 140U series MCCB an actively supported product from Allen-Bradley?

A: The 140U series is generally considered discontinued, and a newer series replacement is recommended.