SMD marking code “31” — 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 | |
|---|---|---|---|---|
| 2SC5663PT | ROHM* | SOT-723 18ta - 3a Chm | Public marking directory | |
| 2SC5663TPT | ROHM* | SOT-416 16ta - 3a Chm | Public marking directory | |
| MMBD1402 | NSC | SOT23 | Public marking directory | |
| MUN5331DW1 | MOT | SOT363 | Public marking directory | |
| PD3S140 | DIODES | — | Public marking directory | |
| PDTA124XE | PHI | SOT-416 | Public marking directory | |
| PDTA124XE | PHI | SC-75/SOT416 | Public marking directory | |
| PDTA124XEF | PHI | SOT-490 | Public marking directory | |
| PDTA124XEF | PHI | SC-89/SOT490 | Public marking directory | |
| R3111Q311B | RICOH* | SC-82AB | Public marking directory | |
| RN5RF31AA | RICOH* | SOT-23-5 | Public marking directory | |
| RN5RZ31AA | RICOH* | SOT-23-5 | Public marking directory | |
| CHT5663M1PT | — | FBPT-723 17ta - 9a Chm | Public marking directory | |
| ELM9831BB | — | SOT-23 16cg VR1 3d Elm | Public marking directory | |
| HMSZ5231B | — | SOD-323 | Public marking directory | |
| MUN5331DW | — | SOT-363 | Public marking directory | |
| R1163D181E5 | — | — | Public marking directory | |
| R1223N182F | — | SOT-23-5 | Public marking directory | |
| UTC8131 | — | SOT-89 | Public marking directory | |
| XC6213B312NR | — | SSOT-24 | Public marking directory | |
| XC6221C39BNR | — | SSOT-24 | Public marking directory | |
| ZD5231BS2 | — | 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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