Square D LAL36400MB - 600 A, 600 V, 3-Pole Circuit Breaker | AmpState

Square D LAL36400MB is a 600 A, 600 V, 3-pole molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for commercial, industrial, and even demanding residential environments, it delivers precise protection where it matters most.

• Compact molded-case design minimizes enclosure depth and maximizes usable space inside panelboards, helping you fit more circuits and conductors without crowding the bus.
• Thermal-magnetic trip unit combines steady thermal protection with instantaneous magnetic tripping, delivering repeatable performance across loads and temperatures while quickly isolating faults.
• 3-pole configuration ensures coordinated protection across all three phases in 3-phase systems, reducing the risk of unbalanced faults and ensuring reliable shutdown when needed.
• OEM compatibility designed to pair with matching Square D OEM load centers and panelboards for straightforward replacement, consistent fit, and predictable electrical performance.
• Versatile application suitable for residential, commercial, and light industrial applications where robust branch-circuit protection is required.

Technical specifications

• Manufacturer: Square D
• Part Number: LAL36400MB
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 600 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Who benefits from the LAL36400MB? electricians, facilities managers, and panel builders who need a reliable, high-capacity breaker that fits within standard Square D panel systems. It’s an ideal choice when upgrading aging panels, expanding capacity in commercial spaces, or stocking a maintenance-ready inventory for consistent, code-compliant protection.

Why choose this model over other breakers? its 3-pole, 600 A rating is purpose-built for 3-phase distribution networks, while the thermal-magnetic trip unit provides dependable protection without frequent nuisance tripping. The compact form factor helps you maximize panel space, and OEM compatibility ensures a seamless, code-compliant installation within existing Square D ecosystems.

Practical tips for use: verify that your panelboard is rated for 600 V and designed for 3-pole devices, confirm the breaker is a compatible match for your specific Square D load center, and follow the manufacturer’s installation instructions for terminal torque and alignment. By pairing the LAL36400MB with a matching panel, you gain predictable protection performance and simplified maintenance over the life of the electrical system.