Square D QO370 70A 3P Circuit Breaker, QO, Plug-On | AmpState

The Square D QO370 70A 3P Circuit Breaker is a dependable choice for protecting your electrical distribution setup—from panelboards to load centers. Designed in the proven QO family with plug-on mounting, this 3-pole breaker delivers secure,快速 installation and reliable interruption when faults occur, keeping your system safer and more resilient.

Key specifications at a glance

• Amperage: 70 A
• Poles: 3
• Mounting: QO plug-on
• Manufacturer: Square D
• Part number: QO370

Why this QO370 breaks the mold for panel protection

• Plug-On reliability: The plug-on design ensures fast, secure installation with consistent contact pressure, reducing installation time and potential loose connections.
• Three-pole protection for multi‑phase systems: Ideal for 3‑pole configurations in electrical distribution, helping maintain balanced protection across circuits.
• Consistent compatibility for retrofits: Retain the same part number during maintenance or upgrades, simplifying inventory and planning for retrofit projects.
• Dedicated support for fit checks: AmpState can help confirm compatibility if you’re aligning this breaker with your existing panel or load center.

Practical use cases

• Retrofit projects where a reliable 70 A, 3-pole QO plug-on breaker is required to upgrade or replace outdated protection devices.
• Electrical distribution upgrades in commercial or industrial environments where panelboards and load centers rely on a robust QO-type solution.
• Maintenance planning that benefits from a readily available, standard part number to minimize downtime and ordering complexity.

What you get: one Square D QO370 circuit breaker, ready to install in compatible QO panelboards or load centers. If you’re unsure about fit, send a message—AmpState is ready to help verify compatibility and ensure you get the exact match for your system.