Square D FC340401212 40A 3-Pole 480 V Circuit Breaker

Square D FC340401212 40A 3-Pole 480 V Circuit Breaker is a robust solution designed for demanding 3-phase power distribution. Built to protect your critical equipment, this device interrupts fault currents on three phases in 480-volt systems, helping to prevent damage to motors, transformers, and downstream circuitry.

• Current rating: 40 A provides precise protection boundaries for medium-sized 3‑phase loads.
• Pole configuration: 3-pole ensures simultaneous disconnection of all phases during a fault, improving safety and system stability.
• Voltage rating: 480 V aligns with typical industrial power distribution in factories, plants, and large facilities.
• Part number clarity: FC340401212 simplifies ordering, maintenance, and on-site replacements by ensuring you pull the exact device you need.

This breaker is ideally suited for protecting 3-phase loads such as large motors, conveyors, pumps, air compressors, and other industrial equipment running off 480 V. It fits into distribution panels and setups where Square D protection is standard, helping maintain consistent performance across your electrical infrastructure.

Why it matters: overcurrent protection is a cornerstone of reliable operation. The FC340401212 isolates faulted circuits quickly and predictably, reducing downtime, limiting equipment wear, and supporting safer, more predictable maintenance cycles in demanding environments.

Use cases and scenarios

• New installations in manufacturing lines that operate on 480 V three-phase power.
• Retrofits or replacements for aging protection on motors and drives in industrial plants.
• Panel upgrades where maintaining Square D compatibility and continuity of protection is a priority.

Maintenance tips

• Keep a compatible spare FC340401212 on-site for critical line protection to minimize downtime.
• Inspect connections and ensure proper torque during installation to maintain reliable operation.
• Regularly verify trip status and document replacements as part of your electrical preventive maintenance program.