Square D | QDA321756 | Circuit Breaker | 175A | 3-Pole | 240V | Plug-In

Meet the Square D QDA321756 Circuit Breaker—an essential plug-in protection solution engineered for reliability in maintenance, retrofit, and replacement projects. With a 175A rating, 3-pole configuration, and a 240V operating profile, this unit delivers dependable overcurrent protection for critical electrical circuits in commercial and industrial settings.

Designed for exact-spec compatibility, this plug-in breaker is ideal when you need a precise match for panels that support QDA-series devices. Before ordering, confirm fit and ratings, and use the part number QDA321756 as your primary reference to ensure seamless interchangeability with your existing Square D setup.

Key specifications at a glance

• Amperage: 175A
• Poles: 3-Pole
• Voltage: 240V
• Connection: Plug-In

What sets this breaker apart

Exact-match compatibility is at the core of safe, code-compliant protection. The QDA321756 is designed to integrate smoothly with Square D panels built for plug-in QDA devices, minimizing downtime during maintenance and retrofit. The 3-pole configuration ensures protection across multiple conductors, making it suitable for multi-wire or three-phase applications where consistent protection matters.

Ideal use cases

• Maintenance outages requiring a direct, spec-matched replacement
• Retrofits to upgrade protection on high-demand circuits
• Replacement in industrial or commercial installations that demand 175A, 3-pole, 240V plug-in protection

Practical installation tips

• Verify the panel model and the breaker's fit ratings before purchase.
• Power down the system and follow local electrical codes during replacement.
• Keep the part number QDA321756 handy as your primary compatibility reference throughout service and ordering.