Square D LRA36600U31X - 600 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Meet the Square D LRA36600U31X from AmpState—a rugged, high-capacity plug-in molded case circuit breaker designed to safeguard your most demanding panelboards and load centers. With a 600 A rating and 600 V maximum, this 3-pole unit delivers precise, reliable protection for large branch circuits, motor feeds, and critical distribution paths in residential, commercial, and light industrial environments.

Why this breaker stands out

• Fast plug-in connection: Designed for quick installation and effortless replacement, minimizing downtime during panel servicing or upgrades.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection. The thermal element guards against nuisance trips due to gradual temperature rise, while the magnetic element rapidly clears short-circuit faults.
• OEM-compatible: Engineered to fit seamlessly with matching Square D OEM load centers and panelboards, ensuring proper fit, coordination, and safe operation.
• Versatile applications: Suitable for residential, commercial, and light industrial electrical systems that require robust branch-circuit overcurrent and short-circuit protection.

Technical snapshot

• Manufacturer: Square D
• Part number: LRA36600U31X
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 600 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Upgrading or retrofitting large residential service panels and heavy-duty subpanels where 600 A feeders are required.
• Serving commercial electrical rooms that feed high-current equipment, lighting, and auxiliary power circuits.
• Protection for light industrial distribution where fast, reliable interruption is critical to equipment safety and uptime.

How it helps you today

• Reliability: The combination of thermal and magnetic protection minimizes nuisance trips while delivering rapid fault clearance during short circuits.
• Maintenance efficiency: The plug-in design reduces service time, making inspection, testing, and replacement straightforward.
• Peace of mind: OEM compatibility ensures consistent performance and easier coordination with existing panelboard architectures.

If you’re building, upgrading, or maintaining power distribution in spaces where high-current protection matters, the Square D LRA36600U31X provides the dependable, code-compliant solution you need. From AmpState, this unit is ready to install in compatible panelboards and loadcenters, delivering real-world protection for demanding electrical layouts.