Square D QOU280 - 80 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Square D QOU280 — 80A, 240V, 2-pole bolt-on molded case circuit breaker designed to deliver reliable branch-circuit overcurrent and short-circuit protection in panelboards and load centers.

Built for durability in environments with vibration or movement, the bolt-on mounting provides a rigid bus connection that resists loosening over time, reducing potential fault conditions and downtime.

The thermal-magnetic trip unit ensures stable, repeatable protection performance across a range of temperatures and loads, interrupting faults quickly while preventing unnecessary trips on normal transients.

With compatibility for matching OEM load centers and panelboards, the QOU280 installs smoothly in standard Square D configurations, helping simplify replacement or expansion projects.

Ideal for residential service panels upgrading circuits, commercial electrical rooms, and light-industrial distribution boards where reliable, code-compliant protection is essential.

Key features

• 80 A at 240 V two-pole molded case circuit breaker for typical branch circuits.
• Bolt-on mounting delivers a secure, vibration-resistant connection to the bus.
• Thermal-magnetic trip provides stable, repeatable protection performance.
• OEM-compatible designed to work with matching Square D load centers and panelboards.
• Versatile applications suitable for residential, commercial, and light industrial installations.

Technical specifications

• Manufacturer: Square D
• Part number: QOU280
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 80 A
• Voltage rating: 240 V
• Number of poles: 2
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips

When installing, verify compatibility with your panelboard or load center and follow the manufacturer's installation instructions for torque and fit. Using the Square D QOU280 in matched OEM configurations helps ensure proper trip characteristics and electrical safety across your system.