Square D QOU380 - 80 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D QOU380—an 80 A, 240 V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection for panelboards and loadcenters. Crafted for steady performance in residential, commercial, and light industrial environments, this unit combines rugged mounting with precise protective action, so you can trust it to guard your electrical system when it matters most.

• Secure bolt-on mounting ensures a rigid, vibration-resistant bus connection, reducing arcing risk and maintaining consistent electrical contact even in demanding service conditions.
• Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overloads (thermal) and short circuits (magnetic) with fast, predictable trips.
• 3-pole design provides balanced protection across all three conductors, helping prevent uneven loading and safeguarding equipment connected in 3-phase or multiwire systems.
• OEM compatibility is built in—this breaker is designed to pair with matching Square D load centers and panelboards for a seamless, plug-and-protect replacement that preserves system integrity.
• Versatile application—well suited for a wide range of installations, from home service panels to commercial distribution boards and light industrial feeders.

Technical highlights at a glance:

• Manufacturer: Square D
• Part Number: QOU380
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 80 A
• Voltage Rating: 240 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Why choose the QOU380? It’s not just a breaker—it's a targeted protection solution designed to minimize nuisance trips while delivering reliable safety. The combination of secure mounting, a responsive thermal-magnetic trip unit, and OEM compatibility reduces installation hassles and simplifies panel maintenance. In environments where vibration, variable loads, or high-availability service are a concern, the QOU380 provides a robust barrier against electrical faults that could disrupt operations or damage equipment.

Who should consider this breaker? electricians, facility managers, and maintenance teams tackling panelboard upgrades, retrofits, or new installations in homes, offices, retail spaces, and light industrial facilities. Its 80 A rating is ideal for feeders and downstream circuits that demand solid protection without compromising available current, while the 240 V, 3-pole configuration supports standard 3-phase or multiwire setups common in many installations.

Practical tips for best results: confirm panelboard compatibility with Square D OEM products, ensure secure torque during bolt-on installation following your service manual, and perform periodic inspections for signs of overheating or bus connector wear. With the QOU380, you gain a dependable protection solution that blends precise physics with straightforward, durable design—protecting people, equipment, and uptime.

Add the Square D QOU380 to your panel today to reinforce your electrical protection strategy with a trusted, OEM-aligned solution.