Terasaki AT12 1250 5A 3 Pole Air Circuit Breaker For Industrial And Commercial Low Voltage Power Distribution

Meet the Terasaki AT12 1250-5A 3-Pole Air Circuit Breaker — a heavy-duty solution engineered for reliable protection and seamless switching in low-voltage power distribution networks across industrial and commercial facilities.

Designed to handle demanding environments, the AT12 combines rugged construction with precise, adjustable trip settings to tailor protection to your exact load profile. With a 3-pole configuration, it provides balanced, three-phase protection essential for modern electrical systems.

Why engineers choose Terasaki AT12

• Three-pole protection for complete phase coverage in 3-phase circuits, reducing the risk of lingering faults and unbalanced loads.
• Adjustable trip settings let you tailor the breaker’s response to your specific distribution load and fault tolerance, improving reliability without sacrificing safety.
• High interruption capacity supports reliable shutdowns under fault conditions, protecting equipment and reducing downtime in critical power paths.
• Main incoming feeders & switchboards compatibility makes it ideal for central feeders and distribution panels where dependable protection matters most.
• Industrial-grade durability designed to withstand the rigors of busy facilities, from manufacturing floors to commercial complexes.

Key specifications

• Model / Part Number: AT12
• Current Rating: 1250-5A
• Poles: 3-Pole
• Breaker Type: Air Circuit Breaker

Practical usage scenarios

• Protect main incoming feeders at switchboards in factories, warehouses, and processing plants.
• Upgrade or retrofit low-voltage distribution panels in data centers or office campuses that require precise overcurrent protection.
• Install as a critical path breaker in large facility power distribution to prevent cascading outages during faults.

Choosing the right protection matters. The Terasaki AT12 1250-5A 3-Pole Air Circuit Breaker offers a deliberate balance of protection, flexibility, and durability designed for real-world industrial and commercial power systems. If you’re upgrading legacy panels or designing a new distribution scheme, this breaker delivers dependable performance with adjustable trip settings and robust interruption capacity to keep critical systems online and safe.