SMD marking code “57” — 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 | |
|---|---|---|---|---|
| BAT17-07 | INFINEON | SOT-143 | Public marking directory | |
| BFQ57 | INFINEON | SOT173 | Public marking directory | |
| R3111Q571B | RICOH* | SC-82AB | Public marking directory | |
| RN5RF57AA | RICOH* | SOT-23-5 | Public marking directory | |
| RN5RZ57AA | RICOH* | SOT-23-5 | Public marking directory | |
| CHDTC124EMPT | — | SOT-723 18ta - 3a Chm | Public marking directory | |
| ELM9857BB | — | SOT-23 16cg VR1 3d Elm | Public marking directory | |
| F1C57 | — | DO-214AC | Public marking directory | |
| FSD273TA-C | — | SOT-323 | Public marking directory | |
| HMSZ5257B | — | SOD-323 | Public marking directory | |
| TCMM5Z4V7 | — | SOD-523 | Public marking directory | |
| XC6217C08ANR | — | SSOT-24 | Public marking directory | |
| XC6221D451NR | — | SSOT-24 | Public marking directory | |
| ZD5257BS2 | — | 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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