Square D | LCF26400 | Circuit Breaker | 400A | 2-Pole | 600V

Square D LCF26400 circuit breaker — a rugged 400A, 2-pole unit rated for 600V, engineered for demanding industrial and commercial electrical systems. Designed for maintenance, retrofit, and replacement projects, this breaker delivers reliable protection while matching exact specifications for a smooth, downtime-minimized swap.

• Exact compatibility — rely on the part number LCF26400 as your primary reference to ensure proper fit and ratings in your panel and distribution network.
• High-current protection — 400A capacity provides robust protection for feeders and main circuits in demanding environments, helping safeguard equipment and uptime.
• Two-pole design — protects both hot conductors in 600V systems, simplifying wiring, trip coordination, and panel organization in shared-load installations.
• 600V readiness — ideal for commercial and light industrial applications where 600V distribution is standard, offering dependable performance under heavy load conditions.

Notes on compatibility — before ordering, confirm fit and ratings for your specific panel and system. The LCF26400 part number is the best reference to ensure seamless integration and reliable protection.

• Use case: panel replacement — swap a failed or outdated breaker with a like-for-like 400A, 2-pole unit to restore critical feeder protection quickly.
• Use case: retrofit projects — upgrade wiring or expand capacity in existing electrical infrastructure while maintaining code-aligned protection on 600V circuits.
• Use case: maintenance replacements — have a ready-to-install unit on hand to minimize downtime during routine servicing of distribution panels.
• Ideal for installers — simplifies procurement and installation when a precise part reference is required for compatibility and compliance.

For optimal results, pair this breaker with correctly rated panels and follow all relevant electrical codes during installation. If you’re upgrading or replacing, the LCF26400 is designed to align with Square D’s form factor, reducing fit-time uncertainty and helping you maintain a safe, reliable electrical system.