DFN / SON
What does DFN / SON mean in a BOM?
A small surface-mount package with pads under two sides and no extended leads. DFN (also called SON) trades board space for tighter assembly tolerances, and package is a hard match when sourcing an alternate.
Related terms
Every part on your BOM, resolved automatically.
O2 reads a bill of materials end to end: it normalizes part numbers, checks lifecycle and compliance on every line, finds alternates, and drafts the quote.