Square D | LA26400 | Circuit Breaker | 400A | 2-Pole | 600V

Square D LA26400 Circuit Breaker — a rugged, high-capacity protection device designed for demanding power systems. This 400A, 2-Pole, 600V breaker is built to support maintenance, retrofit, and replacement projects where reliable overcurrent protection is essential.

• Amperage: 400 A
• Poles: 2-Pole
• Voltage rating: 600 V

Designed for service panels and distribution systems that demand strong, straightforward protection, the LA26400 keeps critical circuits safe from overloads while enabling smooth disconnections across both conductors. This is especially valuable in retrofit or replacement scenarios where you’re upgrading protections to match higher load requirements without overhauling the entire panel.

Why choose the LA26400 for your project?

• Compact, two-pole design that provides simultaneous disconnection for paired conductors, simplifying fault isolation in 600V applications.
• High-current capability with clear, unambiguous protection for essential feeders and large branch circuits.
• Long-term reliability built to withstand the demands of industrial power distribution, helping minimize downtime during maintenance windows.

Compatibility and installation notes

• Before ordering, verify fit and ratings for your specific panel or bus configuration. The LA26400 part number is the most reliable reference for compatibility.
• When replacing an existing breaker, confirm that the panel labeling and service conductors support a 400 A, 2-Pole, 600 V solution to ensure a safe, code-compliant installation.

Ideal use cases

• Retrofit projects upgrading protection to a 400A, 2-Pole, 600V configuration in commercial or light-industrial panels.
• Maintenance replacements where the existing device has reached end-of-life or reliability concerns.
• New installations in systems that require robust, straightforward overcurrent protection for high-load feeders.

In practice, the Square D LA26400 delivers decisive protection when you need to safeguard high-amperage circuits without complicating the panel layout. It’s a practical, purpose-built choice for electricians and facilities teams managing aging infrastructure or planning reliable upgrades. Remember to confirm fit and ratings against your panel’s specifications to ensure optimal performance and safety.