Square D HLL36030M71 30A 3P 600V Circuit Breaker | AmpState

Meet the Square D HLL36030M71—a genuine 3-pole, 30-amp circuit breaker designed to protect three-phase electrical systems at up to 600 volts. This is not a generic component; it’s an exact OEM replacement built to fit Square D panelboards, load centers, and distribution assemblies, helping you maintain safe, reliable power with confidence.

Key reasons to choose the HLL36030M71

• Exact OEM part for BOM accuracy — keep your original part number aligned with your inventory and service records by using the precise HLL36030M71 model.
• Three-pole protection ideal for 3-phase circuits, delivering balanced protection across all legs in industrial, commercial, and multi‑load environments.
• 600V rating suitable for higher‑voltage distribution panels and control centers where robust overcurrent protection is essential.
• Panelboard and load center compatibility specifically intended for Square D infrastructure, making replacements straightforward and reliable.
• Ready availability from AmpState to help minimize downtime on critical projects or maintenance windows.

Who benefits most

• Electrical contractors replacing failed or obsolete breakers in three‑phase panels
• Maintenance teams stocking spares to reduce downtime and preserve BOM integrity
• Facility managers and engineers upgrading or restoring distribution systems that rely on exact OEM specifications

Practical use cases and benefits

• Replacement projects where the original part number must be preserved for safety records and warranty compliance
• New builds or retrofits in facilities with Square D distribution gear that require a 30A, 3P, 600V protection device
• Stocking a precise spare to ensure rapid restoration of service after a tripped breaker without compatibility concerns

Installation and compatibility reminders

Verify that your equipment supports an HLL36030M71-style breaker and follow all applicable electrical codes and safety practices. If you’re unsure about fit, AmpState offers guidance to confirm compatibility so you can proceed with confidence. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.