Overview
The Square D QO280 is an 80 A, 120/240 VAC, two-pole QO thermal-magnetic circuit breaker with plug-in mounting. It provides common-trip protection for both ungrounded conductors and has a 10 kA interrupting rating.
Key Features
-
Protection: The fixed thermal-magnetic trip responds to overloads and short circuits, and the common-trip two-pole mechanism disconnects both conductors together.
-
Installation: QO plug-in bus mounting and box-lug terminals support installation in compatible Square D QO load centers and equipment.
-
Compatibility: Use only in panels and enclosures specifically labeled for QO breakers; verify bus, series and enclosure compatibility.
-
Performance: Rated 80 A, 2 poles, 120/240 VAC and 10 kAIC for single-phase feeder and equipment circuits.
Specifications
-
Model: Square D QO280
-
Electrical rating: 80 A, 2 poles, 1 phase, 120/240 VAC
-
Interrupting rating: 10 kAIC
-
Mounting and connection: QO plug-in with box lugs
-
Conductor range: 4 AWG through 2/0 AWG
-
Temperature and certifications: 40°C ambient rating; UL Listed; CSA certified; HACR rated
Common Applications
- Two-pole feeder and subpanel circuits in compatible QO load centers.
- Large residential or light-commercial equipment loads requiring an 80 A common-trip breaker.
- Exact-model service replacement where QO280 is specified.
