Square D | A1B370 | Circuit Breaker | 3-Pole | 10kA | Bolt-On

Introducing the Square D A1B370 3-Pole 10kA Bolt-On Circuit Breaker — a purpose-built protection device for three-phase electrical systems. Built for maintenance, retrofit, and replacement projects, this breaker delivers dependable fault protection when exact specifications matter, making it a trusted choice for panel upgrades and ongoing system reliability.

• Three-Phase Power — 3-Pole design supports multi-phase circuits, providing balanced, reliable protection for motors, drives, and distribution panels.
• 10kA Interrupting Capacity — Robust fault current interruption helps safeguard equipment and maintain continuity in demanding environments.
• Bolt-On Mounting — Quick, secure installation with a familiar bolt-on interface, ideal for retrofit and replacement projects where seamless integration matters.
• Exact Compatibility — Part number A1B370 serves as the most reliable reference for matching panels and existing breakers. Always verify fit against your system specs.
• Versatile Application — Suitable for maintenance shutdowns, panel retrofits, and replacement needs across industrial and commercial electrical installations.

Use cases include upgrading legacy panels in manufacturing lines, replacing aging protection devices during facility refurbishments, or keeping a ready spare on hand for critical service entrances. The A1B370 is your go-to choice when you need a direct, reliable substitute that aligns with your existing Square D infrastructure.

Fit & Compatibility — Confirm fit and ratings before ordering. The part number is the best reference for compatibility, ensuring you get a precise match for your panel and circuit protection requirements.