Square D | LDF36400U31X | Circuit Breaker | 400A | 3-Pole | 600V

Square D LDF36400U31X Circuit Breaker delivers dependable protection for demanding three‑phase electrical systems. Rated at 400A with a 3‑Pole configuration for 600V applications, this unit is crafted for maintenance, retrofit, and replacement projects where exact specifications matter and compatibility is non‑negotiable.

When precision matters, the part number is your most reliable reference. The LDF36400U31X designation should be cross‑checked against your panel labeling and manufacturer guidance to ensure a perfect fit before ordering.

• Amperage: 400A
• Poles: 3‑Pole
• Voltage: 600V
• Part Number: LDF36400U31X

This breaker is ideally suited for facilities performing panel upgrades, equipment replacements, or service refreshes that must preserve exact Square D specifications. It provides robust protection for three‑phase circuits up to 600V, helping to isolate faults quickly and maintain system reliability in industrial environments.

Who should consider this part:

• Electrical contractors conducting maintenance or retrofit work in 3‑phase, 600V installations
• Facility engineers planning replacements for aging protection devices within Square D panels
• Maintenance teams maintaining spare parts inventories for critical equipment

Practical tips for a smooth purchase: - Always verify fit and ratings against the target panel’s label and documentation; the exact match is essential for safe, code‑compliant operation. - Keep a ready spare on hand for proactive maintenance and quicker restoration after outages.

Opt for the Square D LDF36400U31X when your project demands precise compatibility and reliable protection for 600V, three‑phase systems. Add it to your cart to ensure you have the right part ready for installation, retrofit, or replacement.