Square D
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About Square D
Find over 4500 square d breakers for residential, commercial, and industrial power distribution. This collection covers 1- to 8-pole miniature and molded case configurations, including QO, QOB, and E-frame series with GFCI, AFCI, and dual function types.
Series on this page
- QO: plug-on miniature breakers for Square D QO load centers.
- QOB: the bolt-on version of the Square D QO breaker.
- FA: F-frame molded case breakers.
- EDB, EGB: E-frame molded case breakers.
- Also on this page: B, QOU, 8536, DPA, and H series.
Popular part numbers
- 9007C54B2: limit switch
- QOB120: 20A, 1-pole miniature circuit breaker
- QO120: 20A, 1-pole miniature circuit breaker
- QOB220: 20A, 2-pole miniature circuit breaker
- EDB34030: 30A, 3-pole molded case circuit breaker
How to choose
Start with the breaker series printed on your panel label, identifying if you require QO plug-on or QOB bolt-on mounting. Match the correct pole count and the required amperage rating for your system. Choose GFCI, AFCI, GFEP, or dual function models if your circuit calls for one of those types. Confirm your panel and breaker type are compatible before ordering.