Square D ME36400LI 400A 3-Pole 600 V Circuit Breaker

Introducing the Square D ME36400LI 400A 3-Pole 600 V Circuit Breaker—a rugged, industrial-grade protector built to keep demanding electrical systems safe. With Part Number ME36400LI, this device delivers a robust 400 A current rating across three poles in 600 V three-phase networks, making it a reliable cornerstone for large distribution panels.

Why this breaker stands out

• High-current three-phase protection: The 400 A rating is purpose-built for heavy feeders, motors, and large loads, helping prevent costly outages from overloads and faults.
• Coordinated three-pole design: With three poles working in unison, this breaker ensures synchronized trip across all phases, reducing the risk of phase imbalance and protecting interconnected equipment.
• 600 V system readiness: Engineered for common industrial power architectures, it fits right into 600 V distribution networks found in manufacturing facilities, processing plants, and large commercial installations.
• Easy identification and replacement: Part Number ME36400LI provides a precise match for upgrades, maintenance, and component compatibility within Square D ecosystems.

Ideal applications and use cases

• Main feeders and large distribution panels in manufacturing plants that run on 600 V three-phase power.
• Motor control centers and heavy equipment locations where reliable overload and short-circuit protection are essential.
• Facility upgrades or retrofits requiring a precise 400 A, 3-pole solution with industry-standard compatibility.

What problems it solves

• Prevents downtime by interrupting excessive current before equipment is damaged.
• Maintains system stability through coordinated tripping across all phases, protecting motors and drives from unbalanced loads.
• Provides a dependable, traceable component for upgrades and maintenance in large electrical distributions.

Practical tips for installation and reliability

• Verify the system voltage and amperage match the 600 V / 400 A specifications before installation.
• Ensure terminals are torqued to the enclosure manufacturer’s guidelines to maintain a solid, vibration-resistant connection.
• Use this breaker within appropriate panels and housings designed for Square D devices to maintain performance and serviceability.

Choose the Square D ME36400LI 400A 3-Pole 600 V Circuit Breaker when you need dependable, three-phase protection for demanding 600 V power systems. It combines precise identification, robust protection, and proven performance to keep critical equipment safe and operations running smoothly.