Square D LHL364001027 400A 3-Pole 600 V Circuit Breaker

Square D LHL364001027 is a high-capacity circuit breaker engineered to shield your largest 3‑phase loads. With a 400 A current rating, 3 poles, and a 600 V maximum, this unit delivers dependable protection for demanding commercial and industrial systems.

Key specifications at a glance:

• Current rating: 400 A
• Poles: 3
• Voltage rating: 600 V
• Part number: LHL364001027
• Brand: Square D

Why this model stands out for heavy-duty installations

• Designed for three-phase distribution where high current protection is essential, such as main feeders and large motor circuits.
• Three-pole configuration provides synchronized protection across all phases, helping prevent unbalanced loads and equipment damage.
• Built to integrate with Square D panels and protection schemes, offering reliable trip performance and consistent response under fault conditions.
• Durable construction trusted in industrial environments, with clear labeling for easy inspection and maintenance.

Practical use cases

• Protect large motors and feeders in manufacturing lines, CNC machines, conveyors, or air handling units.
• Serve as the main or sectional protection in commercial electrical rooms and data center floor distribution where 3‑phase 600 V systems are deployed.
• Pair with a compatible Square D enclosure to ensure proper coordination with downstream protective devices.

Installation and safety notes

• Ensure system voltage and amperage align with the breaker’s 600 V / 400 A rating before installation.
• Follow all applicable electrical codes and consult Square D guidelines for mounting torque and wiring practices.
• Only trained professionals should install or replace this breaker to maintain panel integrity and personal safety.

Ready to upgrade your protection? The Square D LHL364001027 400A 3-Pole 600 V Circuit Breaker delivers robust, coordinated safeguarding for heavy-duty systems, helping you minimize downtime and protect critical equipment.