Square D | QDA321256 | Circuit Breaker | 3-Pole | 240V

Square D QDA321256 is a robust 3-pole, 240-volt circuit breaker designed for reliable protection in three‑phase systems. Built for maintenance, retrofit, and replacement projects where exact specifications matter, this unit provides a precise, drop-in option for compatible panels in industrial and commercial settings.

• Poles: 3-Pole
• Voltage: 240V
• Part reference: QDA321256 (the best reference for compatibility)
• Application: Ideal for upgrading, replacing, or retrofitting 3‑phase electrical distribution where a matching 3‑pole 240V breaker is required

Why this matters for your electrical system:

• Direct compatibility within Square D ecosystems: When your panel or equipment calls for a 3-pole, 240V breaker, QDA321256 offers a straightforward, reliable match that aligns with the panel ratings and protection characteristics you rely on.
• Targeted use cases: Suitable for routine maintenance on aging panels, retrofits to add or upgrade 3‑phase circuits, and replacements that keep your system compliant without overhauling wiring or accessories.
• Clear fit guidance: The part number is the clearest reference for compatibility. Always confirm fit and ratings against your panel label and service requirements before ordering.

Best practices for selection and installation:

• Verify before you buy: Cross-check the panel’s documentation to ensure the 3‑pole, 240V rating matches the QDA321256 requirements.
• Plan for reliability: Keep a compatible spare on hand for critical electrical infrastructure to minimize downtime during scheduled maintenance or unexpected outages.
• Safe handling: Follow standard electrical safety procedures during installation and testing, and ensure power is isolated before any replacement work.

Designed for professionals who value precise specifications and dependable performance, the Square D QDA321256 circuit breaker delivers solid protection for 3‑phase 240V circuits. Whether you’re refreshing an aging system, upgrading to accommodate new equipment, or performing routine maintenance, this part provides a trustworthy, name-brand solution built to fit exacting compatibility needs.