Square D HDA36125 125A 3P 600V Circuit Breaker | AmpState

The Square D HDA36125 is a 125 A, 3-pole, 600 V circuit breaker engineered for dependable protection in panelboards, load centers, and electrical distribution systems. Designed to streamline retrofits and ongoing maintenance, this specific part number (HDA36125) helps you keep your installations consistent and easy to service. Why this breaker stands out - Direct-fit reliability for panelboards and load centers: Built to integrate with standard Square D installations, ensuring straightforward replacement without modifying enclosure wiring or mounting provisions. - Retrofit-ready with part-number stability: Ideal for projects where the exact part number must be preserved for compatibility, inventory planning, or ongoing maintenance schedules. - Consistent protection at 600 V: 3 poles deliver balanced, reliable overcurrent protection for multi‑wire circuits and distributed electrical loads in commercial and industrial environments. - Stocked option from AmpState: Ready availability supports quick turnarounds on urgent maintenance or retrofit work. Need help confirming fit or compatibility? Message us and we’ll verify the match. Specifications at a glance

• Part Number: HDA36125
• Manufacturer: Square D
• Product Type: Circuit Breaker
• Amperage: 125 A
• Poles: 3
• Voltage: 600 V

Who benefits from the HDA36125

• Electrical contractors performing panelboard or load-center upgrades where exact part numbers must be maintained.
• Maintenance teams organizing spare parts for reliable, ready-to-install protection devices.
• Facility managers planning long-term electrical distribution strategies with predictable replacement cycles.

Note: If you’re unsure about compatibility, AmpState offers guidance to confirm fit and ensure seamless installation.