SMD marking code “331” — 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 | |
|---|---|---|---|---|
| NDS331N | FS | SOT-23 | Public marking directory | |
| PZM3.3NB1 | PHI | SOT-346 | Public marking directory | |
| PZM3.3NB1 | PHI | SC-59/SOT346 | Public marking directory | |
| R3112N311C | RICOH* | SOT-23-5 | Public marking directory | |
| XC6203E322FR | TOREX* | SOT-223 | Public marking directory | |
| XC6203E322MR | TOREX* | SOT-23 | Public marking directory | |
| XC6203E322PR | TOREX* | SOT-89 | Public marking directory | |
| HZM3.3NB1 | — | — | Public marking directory | |
| HZU33L-2 | — | URP | Public marking directory | |
| XC6104A432MR | — | SOT-23-5 | 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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