Square D LGA36400U33X - 400A, 3-Pole, Circuit Breaker

Meet the Square D LGA36400U33X — a rugged 400A, 3-pole circuit breaker built to protect the lifelines of industrial and commercial electrical systems. Designed for reliable overcurrent protection in demanding environments, this breaker keeps distribution panels, switchboards, and motor control centers running smoothly even under heavy loads.

• 400A current rating for large feeders, high-demand equipment, and heavy-duty motors without prematurely tripping.
• 3-Pole configuration ideal for three-phase systems, ensuring balanced protection across all phases and preventing phase imbalance issues.
• Versatile deployment fits seamlessly in panelboards, switchboards, and control panels, and is well-suited for motor control centers in industrial settings.
• Dependable overcurrent protection minimizes downtime and safeguards wiring, feeders, and connected equipment from faults and short circuits.
• OEM-friendly design supports integration into custom equipment builds and upgrade projects, keeping your solutions scalable and maintainable.

Ideal use cases

• Industrial manufacturing lines with large motors and drives requiring robust protection.
• Commercial facilities with substantial electrical feeders and power distribution needs.
• OEM applications where durable, high-capacity protection is essential for reliability.

Why this breaker stands out

• Engineered for safe operation in distribution panels and motor control centers, helping to prevent cascading failures and costly downtime.
• Three-phase protection that preserves system balance and reduces wear on downstream equipment.
• Rigid construction and dependable performance in environments where space is at a premium but demand is not.

Practical installation tips

• Confirm compatibility with your panelboard or switchboard and ensure the bus and mounting arrangement match the LGA36400U33X specifications before installation.
• Apply proper torque to mounting screws to maintain solid electrical contact and minimize heat under load.
• Plan routine inspections of connections and the mechanism to sustain reliable operation in vibration-prone or harsh industrial settings.

Choosing the Square D LGA36400U33X means selecting a purpose-built solution for high-current, three-phase protection. This breaker delivers the capacity, configuration, and reliability your distribution panels and motor control centers rely on to keep equipment safe and productive.