Square D QOU370 70A 3P 240V Circuit Breaker | AmpState

Square D QOU370 is a 70 amp, 3-pole, 240-volt circuit breaker designed for reliable circuit protection in panelboards, load centers, and electrical distribution systems.

Built for resilience in three‑phase applications, the QOU370 safeguards electrical circuits against overcurrent events, helping prevent equipment damage and costly downtime. It’s a purpose‑built solution for commercial or light‑industrial environments where consistent performance matters.

• 70 A, 3-pole configuration for 3‑phase, 240V circuits
• Optimized for panelboards, load centers, and electrical distribution panels
• Retrofit‑ready design that preserves a consistent part number for easier maintenance planning and inventory management
• Backed by Square D engineering compatibility within the QO family for predictable replacements
• Available from AmpState with straightforward ordering and support

Ideal use cases

• Replacing worn or failed breakers in existing Square D installations without changing panel configurations
• Upgrading or configuring 3‑phase panels to provide 70 A protection for compatible equipment
• Retrofit projects where keeping the same part number simplifies maintenance schedules and stocking
• New 3‑phase installations that require reliable 70 A protection at 240V

Compatibility and expert support

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit, ensuring a smooth, downtime‑free upgrade or repair.

Choose the QOU370 for dependable protection, streamlined maintenance planning, and a practical, long‑term component fit—backed by AmpState’s support and availability.