Square D | LXL36400 | Circuit Breaker | 400A | 3-Pole | 600V

Square D LXL36400 is a 400A, 3-Pole, 600V molded-case circuit breaker from Schneider Electric’s trusted Square D lineup. Built for reliability in industrial and commercial electrical distributions, this unit is ready for maintenance, retrofit, or replacement projects where exact specifications matter and plug-in compatibility is critical.

Designed for use in panels and enclosures that support the LXL frame, the LXL36400 provides solid protection for feeders and branch circuits in systems operating up to 600 volts. Its three-pole design helps safeguard multi-phase circuits, delivering coordinated protection across all conductors while fitting into standard Square D mounting footprints.

• Amperage: 400A
• Poles: 3-Pole
• Voltage rating: 600V
• Series: LXL molded-case circuit breaker
• Part reference: LXL36400 for compatibility and cross-reference

Important notes to ensure a successful installation: confirm fit and ratings before ordering. The part number is the most reliable reference when verifying compatibility with your panel or distribution equipment. If you’re upgrading an aging panel or swapping in a like-for-like replacement, verify the mechanical footprint, mounting pattern, and any trip characteristics required by your system.

Ideal use cases

• Maintenance or replacement in industrial control panels that require a 400A, 3-pole, 600V protection device
• Retrofits where the existing equipment demands an LXL-series MCCB with the same form factor
• Spare part planning for facilities with Square D distribution gear to minimize downtime during service calls

Why choose this unit is simple: it’s a purpose-built, compatible component for systems designed around the LXL frame. By selecting the exact part number, you ensure correct mounting, electrical characteristics, and long-term reliability, reducing the risk of mismatches that can disrupt operation or complicate maintenance.

Practical tips for a smooth install:

• Cross-check the panel manufacturer's data sheet and the LXL36400 cross-reference to confirm compatibility
• Inspect the enclosure’s mounting clearance and bus-stab alignment before replacement
• Plan for proper de-energization and lockout/tagout procedures during replacement or retrofitting
• Keep the exact part number handy for future service needs and ordering replacement parts

For projects requiring dependable, high-current protection within a 600V system, the Square D LXL36400 delivers a confident, straightforward path to safe, compliant operation.