No, you cannot put Eaton breakers into a Square D electrical panel. Eaton breakers (whether BR or CH series) and Square D breakers (whether QO or Homeline series) feature completely incompatible proprietary bus bar mounting clips and physical dimensions. Inserting an Eaton breaker into a Square D box will not lock securely, violates UL safety listings, and creates severe electrical hazards including arcing, poor mechanical contact, and potential house fires.
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