Square D IL34300 300A 3-Pole 480 V Circuit Breaker

Meet the Square D IL34300 300A 3-Pole 480 V Circuit Breaker—a rugged, industrial-grade protector engineered for demanding 480 VAC, three-phase power systems. As part of Square D’s I-Line family, this molded-case breaker delivers dependable overcurrent protection for feeders and large motors with a streamlined plug-in design that simplifies installation and replacement in compatible panels.

• Current rating: 300 A
• Poles: 3
• Voltage rating: 480 V
• Family: Square D I-Line molded-case circuit breaker
• Part number: IL34300
• Industry standard: UL489-listed for reliable protection in commercial and industrial panels

Why this breaker stands out in real-world applications:

• Purpose-built for 480V three-phase systems: Protects feeders and large motors in manufacturing lines, HVAC distributions, data-center infrastructure, and other heavy electrical loads where consistent, coordinated protection is essential.
• Precise thermal-magnetic trip mechanism: Responds swiftly to overloads and short circuits, helping minimize equipment damage and unplanned downtime without nuisance tripping.
• Seamless panel integration: Designed for use in Square D I-Line enclosures, ensuring secure bus connections and straightforward replacement within existing electrical distributions.
• Reliability you can trust: Built to endure demanding environments common in industrial settings, with clear, durable trip indicators and robust construction for long service life.

Ideal use cases

• Main protection for 480V three-phase feeders in industrial facilities
• Protection for large-motor drives, compressors, and heavy machinery circuits
• Replacement or spares in existing Square D I-Line panels to maintain consistent protection across critical loads

How to get the most from this breaker

• Verify panel compatibility: ensure your distribution panel is designed for I-Line 3-pole 480V devices and supports IL34300 series breakers.
• Install with proper electrical practice: secure wire terminations per manufacturer guidelines and follow licensed electrician standards for safe operation.
• Plan for maintenance: keep spare IL34300 units on hand to minimize downtime during replacements or upgrades in busy facilities.

Choosing the IL34300 means opting for a trusted Square D solution that aligns with established 480V, three-phase power architectures. It’s the practical, durable choice for protecting significant electrical assets while enabling efficient maintenance and reliable performance across demanding industrial environments.