Square D ME36400LIG 400A 3-Pole 600 V Circuit Breaker

The Square D ME36400LIG 400A 3-Pole 600 V Circuit Breaker is built for serious industrial power distribution. With a 400-amp current rating, a three-pole design, and a 600-volt maximum, this protector is ready to safeguard feeders and motors in demanding, multi-phase systems.

Why this breaker stands out

• Three-pole coordination ensures all phases trip together, reducing the risk of phase imbalance and protecting equipment from asymmetric faults.
• Thermal-magnetic trip mechanism provides reliable response to overloads and short circuits, helping minimize downtime and electrical damage.
• Rugged molded-case construction designed for industrial environments, delivering durable protection for panel boards, switchboards, and motor control centers.
• 600 V compatibility broadens applicability to mid- to high-voltage distribution schemes often found in commercial and industrial facilities.
• Clear identification part number ME36400LIG simplifies sourcing, maintenance, and future replacements.

Ideal use scenarios

• Feeding large three-phase motors and heavy machinery in manufacturing and processing facilities.
• Main feeder protection for 600V distribution panels and switchgear in industrial settings.
• Motor control center protection where dependable interruption of fault currents is essential for safety and uptime.

How it compares to other options

• Offers true 3-pole protection at a robust 400 A rating, providing balanced, cross-phase protection for three-phase circuits versus smaller or single-pole alternatives.
• 600 V rating enables seamless integration with existing high- and medium-voltage distribution schemes, reducing compatibility concerns during upgrades or retrofits.
• From a trusted brand in electrical protection, ME36400LIG delivers consistency and reliability you can depend on in critical applications.

Practical tips for installation and optimization

• Verify enclosure fit, mounting style, and bus connection requirements to ensure a secure, code-compliant installation.
• Confirm the protection curve and trip characteristics align with your system’s coordination plan to prevent nuisance trips.
• Keep the exact part number ME36400LIG handy for ordering replacements or compatible accessories and for service records.

For industrial power networks that demand dependable, phase-balanced protection, the Square D ME36400LIG 400A 3-Pole 600 V Circuit Breaker delivers the performance and reliability you need to keep equipment protected and uptime high.