Square D LAL26400 - 400 A, 600 V, 2-Pole Circuit Breaker | AmpState

Meet the Square D LAL26400 — a rugged 2-pole molded case circuit breaker rated at 400A and 600V, designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for teams that demand reliability in daily operations, this MCCB combines compact form with precise protection to keep electrical systems safe and efficient.

Why this breaker stands out

• Space-efficient molded case design optimizes panel layouts, freeing room for essential circuits without compromising protection or accessibility.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance a against overloads and rapid short-circuit events, helping minimize nuisance trips while safeguarding equipment.
• OEM-loadcenter compatibility ensures smooth, trouble-free replacements and upgrades in matching Square D load centers and panelboards.
• Versatile for multiple sectors ideal for residential, commercial, and light industrial applications where robust, reliable protection is non-negotiable.
• Two-pole design with common-trip guards both conductors simultaneously, reducing exposure to fault conditions and enhancing overall panel safety.
• High-voltage readiness 600V rating supports a wide range of modern power distribution scenarios, giving you flexibility for evolving electrical systems.

What it protects and how it helps your system

• Protects branch circuits from overcurrent and short circuits, helping prevent conductor damage, insulation failure, and fire risk.
• Maintains panel organization by providing a reliable, predictable response to electrical faults, so downstream equipment and processes experience fewer disruptions.
• Facilitates safer maintenance and upgrades with a known, standard-fit form factor designed for common panelboard configurations.

Ideal use cases

• Upgrading or retrofitting large feeder circuits in residential or light commercial panels where a 400A, 2-pole solution is required.
• Installing or expanding panelboards in small to mid-size commercial spaces and light industrial facilities that demand robust overcurrent protection at the 600V level.
• Replacing a failed breaker within matching OEM assemblies to preserve system integrity and trip characteristics.

Technical snapshot

• Manufacturer: Square D
• Part Number: LAL26400
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage Rating: 400 A
• Voltage Rating: 600 V
• Number of Poles: 2
• Application: Branch circuit overcurrent and short-circuit protection

Designed for dependable performance in demanding environments, the Square D LAL26400 400A 600V 2-pole circuit breaker is a purpose-built solution for serious electrical protection. Its combination of space efficiency, reliable thermal-magnetic trip action, and OEM compatibility makes it a sound choice for pro electricians, facility managers, and maintenance teams looking to safeguard panels and power distribution with confidence.