OVERVIEW

Official designation: Allen-Bradley 140U-H0C3-C50 (Bulletin 140U, Molded Case Circuit Breaker)

Role/Application: H-Frame, 3-pole MCCB rated 50 Amperes. It provides fixed thermal and fixed magnetic protection with high interrupting capacity for industrial circuit protection up to 600 Volts AC.

KEY SPECS SUMMARY

Power: 600 Volts AC maximum

Interfaces / Ports: End cap bolt-on terminals

Indicators: Trip status flag

Operating Temp: Minus 25 to plus 60 degrees C

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

Limit: Interrupting rating 100 kA at 480 Volts AC

Lifecycle: Discontinued, replacement 140G

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the fixed magnetic trip setting value for the 50 Amp H-Frame circuit breaker?

A: The fixed magnetic trip is set at 10 times the rated current, which is 500 Amperes.

Wiring & Installation:

Q: What are the primary dimensions (Height x Width x Depth) of the H-Frame circuit breaker body?

A: Dimensions are approximately 130 millimeters high, 90 millimeters wide, and 82.5 millimeters deep.

Troubleshooting & Compatibility:

Q: Is this 140U breaker rated for 100 percent continuous current or 80 percent continuous current?

A: The 140U-H0C3-C50 is typically 80 percent rated unless specified otherwise in the full manual.

Replacement & Upgrades:

Q: Which current series of Allen-Bradley MCCBs is the standard successor for the older Bulletin 140U breakers?

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