Square D QOU350 - 50 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOU350 is a dependable 50A, 240V, 3-pole bolt-on molded case circuit breaker designed to protect your electrical system with precision. Built for branch circuit overcurrent and short-circuit protection in panelboards and load centers, this unit delivers steady performance in demanding environments—from home setups to light commercial applications.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain reliable protection even in spaces with equipment vibration.
• Thermal-magnetic trip unit combines overload protection (thermal) with fast short-circuit response (magnetic) for stable, repeatable protection across temperature changes and load conditions.
• 3-pole, 50A, 240V design is ideal for protecting three-phase circuits common in panelboards and load centers used in commercial and light industrial settings.
• OEM-compatible compatibility works with matching Square D load centers and panelboards, enabling straightforward swaps or upgrades without custom adapters.
• Versatile across environments suitable for residential, commercial, and light-industrial applications where dependable branch circuit protection is essential.

Key use cases

• Replacing aging or failed breakers in existing Square D panels to restore reliable protection for critical circuits.
• Feeding three independent or balanced three-phase loads in small commercial installations, such as lighting, HVAC, or compact machinery.
• New installations in OEM-compatible panelboards where a robust bolt-on solution is preferred for vibration-prone environments.

Why this breaker stands out

• Rigid, vibration-resistant connection reduces the risk of loose connections that can lead to nuisance trips or degraded protection.
• Consistent protection from its thermal-magnetic trip ensures predictable responses to overloads and short circuits, preserving equipment and reducing downtime.
• Long-term reliability with Square D engineering and compatibility with OEM panels means fewer compatibility headaches and easier maintenance.

Practical tips for use

• Verify your panel compatibility with Square D OEM load centers to ensure seamless fit and electrical performance.
• Use in properly rated panel environments where vibration is a consideration to maximize the bolt-on connection’s benefits.
• Regularly test the protective function in accordance with panel manufacturer guidelines to confirm reliable trip performance.

Designed for installers, facility managers, and homeowners who demand durable, dependable protection for three-phase branch circuits, the Square D QOU350 delivers solid protection, straightforward installation, and lasting performance. Trust AmpState to supply this proven Square D solution for your panelboards and load centers.