Square D | Q1L340 | Circuit Breaker | 3-Pole

Square D Q1L340 Circuit Breaker — a reliable 3-Pole solution designed for maintenance, retrofit, and replacement in three‑phase electrical systems. This 3‑pole model provides synchronized interruption across all phases, enhancing safety and protection in demanding environments.

Compatibility and fit

When selecting this breaker, the part number Q1L340 is your best reference for compatibility. Always confirm fit and ratings before ordering to ensure seamless integration with your existing panel and wiring configuration.

• Designed for three‑phase applications requiring a 3‑pole circuit protectors.
• Ideal for maintenance, retrofit, and replacement projects where exact reference part numbers are critical.
• Part number‑based compatibility helps minimize downtime and mismatches in panel boards and enclosures.

Best-use scenarios

This breaker excels in commercial and industrial settings where three‑phase protection is essential. Use cases include upgrading legacy panels, upgrading control circuits, or replacing failed breakers in equipment rooms, data centers, and manufacturing facilities.

Why choose this 3‑pole breaker

The Q1L340 delivers dependable overcurrent protection across all three lines, helping to prevent equipment damage, reduce fault propagation, and maintain system stability during faults. Its Square D heritage brings a track record of reliable performance in panels that require precise compatibility with the Q1L340 part number.

Installation and care tips

• Review your panel directory and confirm that Q1L340 matches the required rating and pole configuration for your specific panel model.
• Handle with standard electrical safety procedures; ensure power is off and the circuit is de‑energized before replacement or installation.
• Consult your panel manufacturer guidelines if you’re unsure about compatibility or torque specifications for mounting.