RefDes
What does RefDes mean in a BOM?
The label that ties a BOM line to its place on the board: R for resistors, C for capacitors, U for ICs, and so on (R1, C12, U3). Reference designators let a buyer count how many of each part a build needs and reconcile quantities against the schematic.
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.