Square D | HLF36125 | Circuit Breaker | 125A | 3-Pole | 600V

Meet the Square D HLF36125 Circuit Breaker—a purpose-built solution for robust, reliable protection in 3-phase, 600-volt electrical systems. This 125-amp, 3-pole breaker is designed for maintenance, retrofit, and replacement projects where exact specifications matter.

Key specifications

• Amperage: 125 A
• Poles: 3-Pole
• Voltage Rating: 600 V
• Part Number: HLF36125
• Intended Use: maintenance, retrofit, replacement in compatible Square D installations

Why this breaker stands out

• Precise compatibility: The HLF36125 is the best reference for matching panels and upstream protection in 3-phase 600V systems. Always confirm fit and ratings before ordering to avoid mismatches in service cabinets.
• Proven reliability: Square D's legacy in industrial electrical protection means predictable trip characteristics, consistent performance, and longer service life in demanding environments.
• Efficient replacement and retrofits: If you're upgrading or replacing a worn-out 125A, 3-pole load center or switchgear, this unit aligns with common Square D footprints and wiring conventions.

Ideal use cases

• Spare or field replacement for 125A, 3-pole 600V circuits in commercial or industrial panels
• Retrofit projects upgrading legacy protection to a contemporary 3-phase 600V system
• Maintenance cycles where predictable electrical protection is critical for uptime

Practical notes for choosing and using

• Always verify panel compatibility using the catalog or panel labeling; the HLF36125 is the definitive reference for fitment.
• Plan for replacement sizing around load requirements and upstream protection coordination; 125A rating suits mid-range distribution feeders in medium-voltage installations.
• Handle with standard electrical safety procedures; follow the manufacturer’s installation manual for torque and termination guidelines.

With the Square D HLF36125, you’re choosing a time-tested protection device designed to keep your 3-phase, 600V systems safe, compliant, and efficiently managed. Whether you’re stocking a service van, outfitting a retrofit project, or replacing a worn-out breaker, this 125A, 3-pole circuit breaker delivers dependable performance when it matters most.