Square D LC36400 - 400 A, 600 V, 3-Pole Plug-In Circuit Breaker | AmpState

Introducing the Square D LC36400 from AmpState — a robust 400 A, 600 V, 3-pole plug-in molded case circuit breaker designed to protect your most critical branch circuits. Built for dependable overcurrent and short-circuit protection in panelboards and load centers, this unit combines fast installation with precise, reliable tripping performance you can trust in daily operation.

• Fast plug-in connection Enables quick installation and easy replacement during maintenance or panel upgrades, minimizing downtime.
• Thermal-magnetic trip unit Delivers stable, repeatable protection: the thermal element handles gradual overloads while the magnetic element provides an instantaneous response to hard short circuits.
• OEM-compatible design Engineered to drop into matching Square D load centers and panelboards without adapters, ensuring a clean, code-compliant install.
• 3-pole, 400 A, 600 V Ideal for three-phase distributions and higher-load circuits in commercial and light industrial applications.
• Plug-in mounting Facilitates straightforward upgrades and servicing in field or facility environments, reducing installation complexity.

Ideal for who and where this fits

• Electricians and facilities teams working on residential, commercial, and light industrial panelboards seeking reliable protection with OEM compatibility.
• Projects involving panel refreshes, code-compliant retrofits, or capacity upgrades that require a heavy-duty, plug-in circuit breaker.
• Systems that demand quick replacement workflows to minimize downtime during maintenance or fault isolation.

Use cases and practical scenarios

• New installations: Install in three-phase panelboards where 400 A feeders demand robust branch-circuit protection at 600 V.
• Panelboard retrofits: Swap aging breakers with this OEM-matched unit to restore reliable trip performance without rewiring.
• Service upgrades: Support increased load demands in light industrial environments while maintaining compliance with electrical codes.

Technical snapshot

• Manufacturer: Square D
• Part number: LC36400
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 400 A
• Voltage rating: 600 V
• Number of poles: 3
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Choose the Square D LC36400 from AmpState for a trusted, OEM-aligned solution that delivers precise protection, fast serviceability, and compatibility with your existing panel infrastructure. This is more than a breaker—it’s a reliable cornerstone for safe, continuous electrical operation.