Square D, a Schneider Electric brand, is one of the most common breaker brands in North American homes and commercial buildings. We stock more than 500 Square D parts, from everyday QO and Homeline breakers to bolt-on and molded case breakers for commercial panels.
Find your line first. Square D breakers only fit the panel they are made for. The label inside your panel door tells you which one you have:
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Square D QO: 3/4-inch plug-in breakers with the Visi-Trip flag (QO120, QO230, QO250GFI)
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Square D Homeline: 1-inch plug-in breakers for Homeline load centers (HOM120, HOM230, HOM250GFI)
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QOB bolt-on: QO breakers that bolt into NQ and NQOD panelboards
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Molded case breakers: E-frame (EDB, EGB, EJB) and PowerPacT (QDL, QDP, BDL, BGA, BJL) for commercial panelboards and enclosures
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Main breakers (QOM) and whole house surge protectors (HOM2175SB, QO2175SB, HEPD80)
QO and Homeline look alike but are not interchangeable. If you are not sure, send us a photo of your panel label and we will match the breaker for you.
