Square D LAP26400MB 400A 2-Pole 600 V Circuit Breaker

Engineered for demanding power systems, the Square D LAP26400MB 400A 2-Pole 600 V Circuit Breaker delivers robust overcurrent protection for large feeders. With a 400-amp rating and a 2-pole design, it safeguards two conductors against overloads and short circuits at voltages up to 600 V. The LAP26400MB part number ensures precise ordering and easy replacement in compatible Square D panels.

Designed for reliability in industrial environments

The two-pole configuration provides synchronized interruption for paired lines, essential for balanced protection in feeders feeding motors, transformers, or distribution panels. Built to endure the rigors of daily operation, it supports long service life in commercial and industrial electrical rooms.

Key specifications

• Current rating: 400 A
• Poles: 2-pole
• Voltage rating: 600 V
• Part number: LAP26400MB
• Brand: Square D

Ideal use cases

Use this breaker to protect large feeders in commercial or industrial panels, to cap the risk of equipment damage during overloads, or as main-distribution protection for sub-feed circuits. It's well suited for service entrances, machine rooms, and electrical rooms where reliable, high-capacity protection is required.

Installation and compatibility

Designed to fit Square D panels that accept LAP-series breakers, the LAP26400MB integrates with typical electrical distribution setups. Ensure you verify panel compatibility, conductor sizes, and mounting provisions before replacement. For safe installation, follow local electrical codes and lockout/tagout procedures.

Why choose Square D LAP26400MB

Compared to smaller or lower-capacity breakers, the LAP26400MB offers protection at the scale needed for significant power distribution tasks. Its 2-pole design ensures coordinated protection across both lines, reducing the risk of unbalanced faults. Rely on Square D’s engineering for consistent performance and serviceability in industrial environments.