Square D QOU150 - 50 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

The Square D QOU150 is a 50A, 120V, 1-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for durability, it features a secure bolt-on mounting that yields a rigid, vibration-resistant bus connection, so critical circuits stay protected even in environments with equipment movement or vibration.

• Secure bolt-on mounting for a rigid, vibration-resistant bus connection that stays solid over time.
• Thermal-magnetic trip unit provides stable, repeatable protection against overloads and short circuits, reducing nuisance trips and ensuring consistent performance.
• OEM-compatible design engineered to be compatible with matching Square D OEM load centers and panelboards for a seamless fit.
• 1-pole, 50A, 120V configuration ideal for protecting individual 120V branch circuits with higher current requirements in residential, commercial, and light industrial settings.
• Bolt-on molded case construction makes servicing and replacement straightforward in field installations, helping keep electrical systems up and running.

Whether you’re stocking a residential panelboard, outfitting a small commercial distribution panel, or organizing a light-industrial distribution center, the QOU150 delivers precise protection aligned with real-world load profiles. Its 50A rating at 120V makes it suitable for heavier-duty 120V circuits, such as dedicated power feeds for powerful tools, workshop equipment, or high-demand lighting banks within a single circuit branch—wherever a reliable single-pole protection device is required.

In practice, this breaker shines in panels that demand durable, field-serviceable protection. The bolt-on design minimizes loosening from vibration and movement, while the thermal-magnetic trip unit reacts rapidly to overloads and short circuits, helping prevent damage to wiring and connected devices. For installers and facility managers, this means fewer call-backs and a quicker, cleaner replacement process when upgrading or maintaining panelboards and loadcenters.

Key details to keep on hand: Part Number QOU150, 50A rating, 120V operation, 1-pole, and bolt-on mounting. Choose the Square D QOU150 when you need a reliable, OEM-compatible solution that pairs precise protection with straightforward installation for residential, commercial, and light industrial circuits.