SMD marking code “3E” — 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 | |
|---|---|---|---|---|
| BC857A | PHI | SOT-23 | Public marking directory | |
| BC857AT | NXP | SOT-416 | Public marking directory | |
| BC857AT | PHI | SC-75/SOT416 | Public marking directory | |
| BC857AT | MCC | SOT-523 | Public marking directory | |
| BC857AW | DIODES | SOT-323 | Public marking directory | |
| BC857B | MCC | SOT-23 | Public marking directory | |
| FMMT-A42 | FERRANTI | SOT23 | Public marking directory | |
| FMMTA42 | ZETEX | SOT-23 | Public marking directory | |
| KST10 | FSC | SOT-23 | Public marking directory | |
| MMBTH10 | FSC | SOT23 | Public marking directory | |
| R3111N431A | RICOH* | SOT-23-5 | Public marking directory | |
| RB717F | MCC | SOT-323 | Public marking directory | |
| RB751G-40 | MCC | SOD-723 | Public marking directory | |
| RH5RL53AA | RICOH* | SOT-89 | Public marking directory | |
| RN5RL53AA | RICOH* | SOT-23-5 | Public marking directory | |
| RQ5RW34AA | RICOH* | SOT-143R | Public marking directory | |
| 2SA2021 | — | SSSMini3 18ta - 3a Pan | Public marking directory | |
| 3SK144 | — | SOT-143 | Public marking directory | |
| BC857AF | — | SOT-490 | Public marking directory | |
| CH717FPT | — | SOT-323 16dg - 3a Chm | Public marking directory | |
| CMBTH10 | — | SOT-23 | Public marking directory | |
| MM3Z62V | — | SOD-323 | Public marking directory | |
| R3131N46EC5 | — | SOT-23 | Public marking directory | |
| R3132Q44EA | — | SOT-143 | Public marking directory | |
| RN5VD43CA | — | SOT-23-5 | Public marking directory | |
| XC6127N23DNR | — | SSOT-24 | Public marking directory | |
| XC6213B34ANR | — | SSOT-24 | Public marking directory | |
| XC6217D152NR | — | SSOT-24 | Public marking directory | |
| XC6223A311NR-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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