SMD marking code “S3” — 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 | |
|---|---|---|---|---|
| 1SS357 | TOS | SOD-323 | Public marking directory | |
| 1SS369 | TOS | SOD-323 | Public marking directory | |
| 1SS388 | TOS | SOD-523 | Public marking directory | Request quote |
| BBY51 | INFINEON | SOT-23 | Public marking directory | |
| BFQ31R | FERRANTI | — | Public marking directory | |
| R1121N331B | RICOH* | SOT-23-5 | Public marking directory | |
| R3116Q201C | RICOH* | SC-82AB | Public marking directory | |
| SD101CW | DIODESINC | SOD-123 | Public marking directory | |
| SD101CWS | MCC | SOD-323 | Public marking directory | |
| SD103ATW | MCC | SOT-363 | Public marking directory | |
| 2SA813-3 | — | SOT-23 16ta - 3a Nec | Public marking directory | |
| BBQ31R | — | SOT-23 | Public marking directory | |
| BSV36 | — | SOT-323 | Public marking directory | |
| ELM7633HCB | — | SOT-23 16vdc VD7 3d Elm | Public marking directory | |
| ELM9743CAB | — | SOT-89 | Public marking directory | |
| FMS3 | — | SOT-23-5 | Public marking directory | |
| FS2D | — | DO-214AA | Public marking directory | |
| R1131D131D | — | — | Public marking directory | |
| R1225N152D | — | SOT-23-6W 33so | Public marking directory | |
| R3130N29DA3 | — | SOT-23 | Public marking directory | |
| RP104Q301D | — | SC-82AB | Public marking directory | |
| XC6223C13BNR-G | — | 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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