Terasaki AT12 1250A 690VAC 3 Pole Air Circuit Breaker Industrial Low Voltage Power Distribution Reliable Protection

The Terasaki AT12 1250A 690VAC 3-Pole Air Circuit Breaker is engineered for the relentless demands of industrial and commercial power systems. Built to protect and swiftly isolate low-voltage distribution networks, this heavy-duty device delivers reliable protection and precise switching where it matters most.

Designed to handle large feeders and critical circuits, the AT12’s three-pole architecture ensures balanced protection across all phases and clean, concurrent disconnection. With a 1250A current rating and a 690VAC voltage rating, it securely clears faults and safeguards equipment, helping prevent cascading outages and extensive downtime in demanding environments.

• Three-pole protection provides synchronized disconnection of all phases for complete circuit isolation.
• 1250A current rating supports main incoming feeders and high-demand distribution panels.
• 690VAC maximum voltage tailored for robust industrial low-voltage distribution networks.
• Adjustable trip settings enable tailored protection coordination with upstream devices and specific motor start profiles.
• High interruption capacity facilitates rapid fault clearance, reducing arc duration and protecting surrounding equipment.
• Industrial-grade reliability built to withstand the harsh conditions of production floors, switchgear rooms, and busy facilities.
• Versatile applicability ideal for main incoming feeders, switchboards, and critical power distribution where dependable protection is non-negotiable.

In practical terms, the AT12 helps facility teams minimize downtime, guard expensive motors and transformers, and simplify protection strategy with a single, robust solution for essential circuits. It’s an excellent choice for electrical engineers, plant managers, and contractors tasked with upgrading or expanding low-voltage power distribution with a trusted, long-lasting breaker.

Specifications at a glance

• Model/Part Number: AT12
• Current Rating: 1250A
• Voltage Rating: 690VAC
• Poles: 3-Pole
• Breaker Type: Air Circuit Breaker
• Applications: main incoming feeders, switchboards, critical power distribution
• Trip settings: adjustable