SMD marking code “2X” — 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 | |
|---|---|---|---|---|
| 2SC4410 | TOS* | SOT-323 16ta - 3a Pan | Public marking directory | |
| KST4401 | FSC | SOT-23 | Public marking directory | |
| MMBT4401 | FSC | SOT-23 | Public marking directory | |
| MMBT4401T | DIODES | SOT-523 | Public marking directory | |
| MMBT4403 | DIODES | — | Public marking directory | |
| PXT4401 | PHI | SOT-89 | Public marking directory | |
| UNRF1A5 | PANASONIC* | — | Public marking directory | |
| 2SC3707 | — | SC-59 | Public marking directory | |
| MM3Z33V | — | SOD-323 | Public marking directory | |
| R1210N421C | — | SOT-23-5 | Public marking directory | |
| TMPT4401 | — | SOT-23 | Public marking directory | |
| XC6127N49CNR | — | SSOT-24 | Public marking directory | |
| XC6221C35BNR | — | SSOT-24 | 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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