Square D LA26400BC 400A 2-Pole 600 V Circuit Breaker

Square D LA26400BC is a rugged 400A, 2-pole, 600V circuit breaker designed for demanding commercial and light industrial electrical systems. Part number LA26400BC, it delivers dependable overcurrent protection for feeders and key circuits while ensuring safe shutdown of both hot legs.

Key specifications

• Current rating: 400 A
• Poles: 2
• Voltage rating: 600 V
• Product family: Square D circuit breakers
• Model compatibility: designed for use in compatible Square D panels and distribution boards that accept 2-pole 400A devices

Why this matters in real-world installations

In large commercial service panels or industrial distribution networks, a 400A two-pole breaker like the LA26400BC provides robust protection for heavy feeders. The two-pole design guarantees both hot conductors are opened simultaneously, preventing dangerous phase-to-ground or phase-to-phase faults and helping to meet electrical safety requirements.

Ideal use cases

• Main service disconnects in commercial buildings where a single device controls supply to major feeders
• Protection for heavy equipment feeders in manufacturing environments
• Subpanel protection for zones with high-current demands, ensuring quick, reliable interruption if a fault occurs

Installation and care

Install in compatible Square D enclosures that support 2-pole 400A, 600V breakers. Ensure proper torque on lugs per panel manufacturer specifications and verify all connections are clean and tight. Follow electrical codes and safety practices when wiring, testing, or replacing a breaker.

Why choose Square D for this role

Square D has a long-standing reputation for reliable, sturdy protection devices in heavy-duty electrical systems. The LA26400BC combines the brand’s build quality with a precise 400A rating and a 600V capability, making it a practical, long-term solution for critical power paths in commercial and industrial facilities.