Square D QDA221501 - 150 A, 240 V, 2-Pole Plug-In Circuit Breaker | AmpState

Discover the Square D QDA221501 — a rugged 150 A, 240 V, 2-pole plug-in molded case circuit breaker built to safeguard your panelboards and load centers. Designed for dependable branch circuit overcurrent and short-circuit protection, this device excels in residential, commercial, and light industrial settings, delivering reliable performance when it matters most.

What makes it unique

• Fast plug-in connection for quick, tool-free installation and hassle-free replacement in compatible Square D OEM load centers.
• Thermal-magnetic trip unit provides stable, repeatable protection across a range of loads and ambient temperatures, reducing nuisance trips and protecting wiring and equipment.
• 2-pole design at 150 A and 240 V delivers coordinated protection for 240 V circuits with a common trip, ideal for high-demand feeders and multi-wire branch circuits.
• OEM-compatible housing engineered to fit Square D load centers and panelboards seamlessly, preserving system integrity and labeling clarity.
• Versatile for multiple environments—perfect for homes, small to mid-size commercial spaces, and light industrial applications needing sturdy, reliable protection.

Technical specifications

• Manufacturer: Square D
• Part number: QDA221501
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 150 A
• Voltage rating: 240 V
• Number of poles: 2
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases and benefits

Upgrade a subpanel feeding a workshop, garage, or home office with a dependable 150 A, 240 V two-pole breaker that installs in minutes. The plug-in design minimizes wiring and bolting steps, reducing service downtime during replacements or panel upgrades. The thermal-magnetic trip unit reacts swiftly to overloads and short circuits, helping prevent electrical fires and protecting connected equipment.

Why this breaker stands out from substitutes

Built to pair with Square D OEM load centers, the QDA221501 delivers a guaranteed-fit experience and consistent protection performance aligned with your panel’s trip curves and labeling. This alignment supports smoother inspections, easier maintenance, and more predictable system behavior in daily operations.

Whether you’re replacing a failed breaker, expanding capacity in a growing space, or installing a new panel, the Square D QDA221501 provides a reliable, install-ready solution that combines robust protection with straightforward serviceability.