SMD marking code “XO” — candidate parts
Small packages rarely print the full part number. The marking below maps to these part numbers — verify against the package, pin count and the manufacturer's datasheet before ordering.
Candidate part numbers
| Part number | Manufacturer | Package | Mapping basis | |
|---|---|---|---|---|
| 2SK209-O | TOS* | SOT-23 16fa - 3a Tos | Public marking directory | |
| BZX284-B30 | PHI | SOD-110 | Public marking directory | |
| BZX284-B30 | PHI | SOD110 | Public marking directory | |
| CMDZ5242B | CSC CENTRAL SEMIC.CORP.* | SOD-323 | Public marking directory |
How these mappings are compiled: from public SMD marking directories and from our own stock records (marked Stock-record verified). We keep the original reference of every row internally so any mapping can be traced on request.
Markings are indicative only: the same code can denote different parts across manufacturers and packages. Always confirm with the physical batch marking and the original datasheet.
* Manufacturer derived from the part-number family (some directory entries carry no manufacturer) — treat it as a lead, not a datasheet fact.
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