Square D | LI36400 | Circuit Breaker | 400A | 3-Pole | 600V

Square D LI36400 Circuit Breaker is a rugged protection solution engineered for demanding electrical systems. With a 400A rating, 3-pole configuration, and a 600V operating envelope, this device is built to safeguard large motors, feeders, and three‑phase loads in industrial and commercial panels. Identified by the part number LI36400, it’s the precise choice for installations that require exact specification matching.

• Brand: Square D
• Part number: LI36400
• Amperage: 400A
• Poles: 3-Pole
• Voltage rating: 600V

This breaker is purpose-built for maintenance, retrofit, and replacement projects where you must align with existing specifications. The 3‑pole design supports three‑phase electrical systems, delivering reliable protection for high‑demand equipment and complex power distribution layouts. Its 600V rating makes it suitable for a broad range of industrial applications, where robust fault isolation and quick interruption are essential for uptime and safety.

Who benefits most from the LI36400:

• Facilities upgrading or expanding three-phase motor control centers and feeders
• Maintenance teams performing panel refurbishments or component replacements
• Engineers specifying exact Square D compatibility to ensure seamless integration

Key considerations for ordering:

• Always confirm fit and ratings before purchasing. The part number LI36400 is the best reference for compatibility with your panel and existing protection scheme.
• Use in applications where a high-current, three‑pole, 600V circuit breaker is required to reliably interrupt and protect heavy loads.

In practice, this LI36400 breaker helps you maintain electrical safety and system availability during installations and upgrades, reducing downtime and ensuring your protection scheme remains consistent with your panel’s original design.