Square D QO is Schneider Electric's premium line of 3/4-inch plug-in circuit breakers for QO load centers. QO breakers have a Visi-Trip indicator that shows at a glance which breaker tripped.
QO and Homeline are not interchangeable. QO breakers are 3/4 inch wide per pole; Homeline breakers are 1 inch and only fit Homeline panels. Check the label inside your panel door before ordering.
In this collection:
- Standard 1-pole and 2-pole breakers (QO120, QO220, QO230, QO250 and more)
- GFCI breakers (QO120GFI, QO230GFI, QO240GFI, QO250GFI)
- Arc fault and dual function AFCI/GFCI breakers (QO120PAF, QO115PAFGF, QO120PAFGF)
- Tandem breakers (QO1515, QO2020) and QOB bolt-on breakers
- QO surge protectors (QO2175SB, QO250PSPD)
Pigtail or plug-on neutral? Plug-on neutral models (part numbers with a "P", like QO120PAFGF) clip onto a neutral rail and only fit QO plug-on neutral load centers. Pigtail models have a white wire that connects to the neutral bar and fit standard QO panels.
See also: arc fault breakers, whole house surge protectors and tandem breakers.
