Square D | QHB330 | Circuit Breaker | 30A | 3-Pole | Bolt-On

The Square D QHB330 Circuit Breaker is a purpose-built, 30A 3-Pole bolt-on solution designed for reliable protection in compatible Square D panels. Built for maintenance, retrofit, and replacement projects, this exact-part model helps you keep power safe and systems running with minimal downtime.

Why the QHB330 stands out

• Three-pole protection—ideal for 3-phase circuits, delivering balanced overcurrent protection across all conductors.
• 30-amp rating—provides sturdy protection for mid-range feeders and branch circuits without sacrificing performance.
• Bolt-on mounting—secure, durable installation that simplifies future service and helps maintain panel integrity during replacements.
• Exact fit reference—the QHB330 part number is your best reference for compatibility with Square D panels, reducing guesswork and mismatch risk.
• Targeted use cases—engineered for maintenance, retrofit, and replacement tasks within Square D electrical systems.

Compatibility and installation notes

Before ordering, confirm fit and ratings for your specific setup. The QHB330 part number is the most reliable guide to compatibility within Square D systems. If your panel requires a different breaker family or bus configuration, this model may not be suitable—even if amperage and pole count match.

Who benefits most

Electrical professionals, facilities managers, and contractors working with Square D panels will appreciate the precision fit, straightforward bolt-on installation, and clear reference in the part number. It’s especially well-suited for retrofit projects, routine maintenance, and reliable replacements where uptime is critical.

Keep this breaker on hand for planned maintenance windows or urgent replacement scenarios in commercial and light industrial environments, ensuring continued protection and consistent electrical performance.