Square D LAP26400MT 400A 2-Pole 600 V Circuit Breaker

Square D LAP26400MT 400A 2-Pole 600 V Circuit Breaker is a rugged protection device designed for heavy-duty electrical distributions. With a 400 A current rating, a two-pole configuration, and a 600 V maximum voltage, this breaker delivers reliable overcurrent protection for demanding panels and feeders in commercial and industrial environments.

Key specifications

• Part Number: LAP26400MT
• Current rating: 400 A
• Poles: 2
• Voltage rating: 600 V

In practical terms, the LAP26400MT protects downstream equipment and wiring by interrupting fault currents, helping prevent damage to feeders, transformers, and connected loads. The 2-pole design ensures simultaneous switching of both conductors, enhancing safety and fault clearance in 600 V distribution schemes.

Ideal applications and use cases

• Industrial power distribution panels requiring robust 400 A main protection
• Commercial electrical systems with 600 V service capabilities needing reliable two-pole interruption
• Replacement or upgrade for compatible Square D panels where a 400 A, 2-pole, 600 V device is specified

What makes this breaker stand out

• Brand you can trust: Square D brings a long track record of dependable electrical protection and consistent performance across panels and distribution gear.
• Clear electrical protection at scale: designed to handle high-current feeders and protect large circuits without compromising response time or reliability.
• Seamless integration with Square D ecosystems, simplifying procurement, panel compatibility, and maintenance planning.

Installation and safety notes

Before installing or replacing, ensure the device is appropriate for your panel and system voltage. Follow all local electrical codes and safety practices, disconnect power before service, and verify proper mounting and termination per manufacturer guidelines. If you’re upgrading or performing routine maintenance, confirm panel compatibility with the LAP26400MT and replace only with the same part number or an exact substitute specified for your setup.