Square D | A1B340 | Circuit Breaker | 3-Pole

The Square D A1B340 Circuit Breaker is a reliable 3-pole protection device designed for three-phase electrical panels. Built to support maintenance, retrofit, and replacement projects, it helps keep critical systems safe while preserving compatibility with existing Square D installations. Key reasons to choose the A1B340 3-Pole breaker

• Three-pole design for balanced protection: Ideal for 3-phase electrical setups where all three lines require simultaneous, coordinated protection.
• Part number clarity: The A1B340 designation is the strongest reference for compatibility, simplifying sourcing and reducing mis-orders.
• Versatile用途: Suitable for maintenance, retrofit, and replacement tasks, making it a dependable choice whether upgrading legacy panels or restoring protective coverage.
• Compatibility-focused sourcing: A clear reminder to confirm fit and ratings before ordering to ensure a seamless match with your panel and system requirements.
• Durable, proven performance: Built to deliver consistent protection in everyday industrial and commercial applications within Square D ecosystems.

Who this is ideal for

• Maintenance technicians replacing failed or worn-out breakers in three-phase panels
• Retrofit projects where upgrading to modern protection requires a 3-pole Square D device
• Facilities managers overseeing service panels that rely on well-documented part references for fast procurement

Use cases and practical considerations

The A1B340 is well-suited for commercial or light industrial environments that operate three-phase equipment. When ordering, use the part number A1B340 as your primary reference to verify compatibility with your panel model and electrical ratings. This approach minimizes downtime by ensuring you select a breaker that matches the form factor and protective characteristics your system expects.

Installation and handling tips

• Always verify that the panel accepts the A1B340 form factor and that the breaker’s trip characteristics align with your protection plan.
• Shut off power and follow safety protocols before attempting replacement to prevent shock or equipment damage.
• Document the panel model and existing breaker type to streamline future maintenance or replacements.

Specification snapshot

• Poles: 3-Pole
• Part number: A1B340
• Category: Square D Circuit Breaker
• Use case: Maintenance, retrofit, and replacement in compatible 3-phase panels