SMD marking code “F12” — 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 | |
|---|---|---|---|---|
| 2SC4178-12 | NEC* | SOT-323 16ta - 3a Nec | Public marking directory | |
| DTB123EK | ROHM | SOT-346 16ta - 3a Rhm | Public marking directory | |
| 2SC2223-12 | — | SOT-23 16ta - 3a Nec | Public marking directory | |
| R1224N122F | — | SOT-23-5 | Public marking directory | |
| SMF12 | — | SC-70-5L | 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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