Square D NT12H 1200A 440VAC Air Circuit Breaker For Industrial And Commercial Power Distribution

Square D NT12H 1200A 440VAC Air Circuit Breaker is engineered for rugged reliability in industrial and commercial power distribution. This heavy‑duty air circuit breaker protects and switches low‑voltage power systems in demanding facilities, delivering dependable performance where it matters most.

• Model / Part Number: NT12H
• Current Rating: 1200A
• Voltage Rating: 440VAC
• Breaker Type: Air Circuit Breaker

Designed for main incoming feeders, switchboards, and critical distribution points, the NT12H supports adjustable trip settings and high interruption capacity. This combination enables precise protection coordination across your electrical network while safely interrupting large fault currents, helping minimize downtime and equipment damage.

Why the NT12H stands out

• Tailored protection with adjustable trip settings so you can coordinate upstream and downstream devices for optimal safety and reliability.
• High interruption capacity to reliably clear significant fault currents without compromising system stability.
• Robust, industrial-grade construction built to endure challenging environments found in factories, distribution centers, and large commercial facilities.
• Seamless integration with established Square D power distribution ecosystems, ensuring compatibility with existing panels, switchboards, and maintenance practices.

Ideal applications include new installations and retrofits in factories, data centers, warehouses, and other facilities where dependable main feeder protection is essential. If your system requires proven protection at the heart of the distribution network, the NT12H delivers the performance you can trust.

Practical guidance for deployment—plan trip settings around your coordination study to balance protection speed and selectivity; ensure proper enclosure compatibility and terminal torque during installation; and schedule routine checks that verify clean operation under load. For facilities seeking a proven, scalable solution for heavy‑duty power distribution, the Square D NT12H 1200A 440VAC Air Circuit Breaker offers clear advantages in protection, reliability, and long‑term uptime.