Terasaki AT-6 630A 660V 3-Pole Air Circuit Breaker For Industrial And Commercial Power Distribution

The Terasaki AT-6 630A 660V 3-Pole Air Circuit Breaker is built for heavy-duty protection and reliable switching in industrial and commercial power distribution. Engineered to handle demanding fault currents, this air breaker safeguards main feeders, switchboards, and critical loads across manufacturing floors, data centers, and large facilities with consistent performance.

With a 630A current rating and a 660V voltage rating across 3 poles, the AT-6 delivers precise, fast interruption when faults occur, helping to minimize downtime and protect equipment downstream. The adjustable trip settings give you the control to tailor protection to your specific network topology, enabling coordinated protection with upstream devices and reducing nuisance trips while preserving system reliability.

Key differentiators

• Three-pole design provides balanced protection across all three phases, supporting reliable coordination in three-phase power distribution.
• Adjustable trip settings enable precise protection tuning to your site's feeders and downstream protection schemes.
• High interruption capacity ensures rapid fault current clearance, safeguarding cables, transformers, and connected loads.
• Heavy-duty air circuit breaker crafted for enduring operation in challenging industrial and commercial environments.
• Ideal for critical power distribution including main incoming feeders, switchboards, and essential distribution panels where dependable protection matters most.

Ideal use cases

• Main incoming feeders in industrial facilities and manufacturing plants.
• Switchboards and panelboards requiring robust phase protection and quick fault isolation.
• Commercial complexes with demanding power distribution needs and coordinated protection schemes.
• Upgrades and retrofits in existing low-to-medium voltage distribution networks seeking improved reliability.

How it protects your system

When a fault occurs, the Terasaki AT-6 acts quickly to interrupt current flow, isolating the faulty circuit before damage propagates through cables, transformers, or downstream equipment. The adjustable trip settings let engineers tailor the response to the specific fault current and protection coordination required by the installation, reducing downtime and enhancing overall system resilience.

Specifications at a glance

• Model / Part Number: AT-6
• Current Rating: 630A
• Voltage Rating: 660V
• Poles: 3-Pole
• Breaker Type: Air Circuit Breaker

Designed for reliability in industrial and commercial power distribution, the Terasaki AT-6 630A 660V 3-Pole Air Circuit Breaker is a precise, capable choice for protecting essential electrical infrastructure. Ready for integration into main feeders and switchboards, it delivers dependable performance when it matters most—keeping systems safe, productive, and online.