Square D HDL36125 125A 3P Circuit Breaker | AmpState

Square D HDL36125 125A 3-Pole Circuit Breaker is a purpose-built protection device for panelboards, load centers, and electrical distribution systems. With a 125-amp rating and three poles, this 3P breaker is designed to safeguard three-phase circuits, delivering dependable overcurrent protection where it matters most.

Engineered for a direct part-number match, HDL36125 simplifies replacement in existing installations. For maintenance teams, panel builders, and spare inventory managers, this means faster swaps, reduced downtime, and fewer compatibility questions on the job. If you’re unsure about fit, Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.

Key benefits

• Direct compatibility with systems that specify HDL36125, ensuring precise electrical and physical fit.
• 125 A rating provides strong protection for circuits with moderate-to-high load requirements.
• Three-pole design supports three-phase distribution, helping balance loads and simplify panel wiring.
• Reliability built by Square D, a trusted name in electrical protection and panel distribution.
• Available from AmpState, making it straightforward to source as part of maintenance or spare-inventory programs.

Ideal use cases

• Replacing a failed or worn HDL36125 in existing Square D panelboards and load centers.
• Stocking spare parts for panel builders and service teams to minimize on-site downtime.
• Specifying a ready-to-install, three-phase protection solution for new electrical distribution projects that require a 125A, 3-pole breaker.

Specifications at a glance

• Manufacturer: Square D
• Part Number: HDL36125
• Type: Circuit Breaker
• Amperage: 125 A
• Poles: 3 (3-Pole)
• Applications: Panelboards, Load Centers, Electrical Distribution

Availability and support: HDL36125 is available from AmpState. If you need a quick compatibility check or want to confirm fit for a specific panel model, reach out—the team can verify the match and ensure a seamless replacement path for your project.