Square D | MXL36400 | Circuit Breaker | 400A | 3-Pole | 65kA

The Square D MXL36400 circuit breaker is built to protect demanding three‑phase power systems with precision. With a 400 A rating, a 3‑pole configuration, and a robust 65 kA interrupting capacity, this unit provides dependable fault protection for large loads and critical equipment.

Designed for maintenance, retrofit, and replacement projects where exact specifications matter, the MXL36400 ensures you’re choosing a part that matches your existing setup. The part number is the most reliable reference for compatibility, helping you avoid mismatches that can lead to downtime.

Key specifications

• Amperage: 400 A
• Poles: 3‑Pole
• Interrupting rating: 65 kA

Why this matters

In industrial environments, clean, predictable protection translates to less unplanned downtime and longer equipment life. The MXL36400 is purpose‑built to handle high‑current feeders while delivering reliable tripping performance when faults occur. Using the exact part number ensures you’re not compromising protection or panel compatibility during upgrades or replacements.

Ideal use cases

• Maintenance: replace aging breakers to restore original protection characteristics
• Retrofit: upgrade legacy panels to modern, high‑reliability protection
• Replacement: stock the exact reference for quick service calls and sparing

Compatibility reminder: Confirm fit and ratings before ordering. The MXL36400 part number is the best reference for ensuring seamless compatibility with your Square D panels and distribution gear.