SMD marking code “21” — 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 | |
|---|---|---|---|---|
| 1PS59SB21 | PHI | SC-59 | Public marking directory | |
| MM5Z43V | FSC | SOD-523 | Public marking directory | |
| R3111Q211B | RICOH* | SC-82AB | Public marking directory | |
| RN5RF21AA | RICOH* | SOT-23-5 | Public marking directory | |
| RN5RZ21AA | RICOH* | SOT-23-5 | Public marking directory | |
| VNA-21 | MINI CIRCUITS | SOT-363 | Public marking directory | |
| CHP222MPT | — | SOT-723 18df - 3a Chm | Public marking directory | |
| ELM9821BB | — | SOT-23 16cg VR1 3d Elm | Public marking directory | |
| Gali-21 | — | SOT-89 | Public marking directory | |
| HMSZ5221B | — | SOD-323 | Public marking directory | |
| MM3Z43V | — | SOD-323 | Public marking directory | |
| R1163D311E | — | — | Public marking directory | |
| R1223N302B | — | SOT-23-5 | Public marking directory | |
| UTC8121 | — | SOT-89 | Public marking directory | |
| XC6213B212NR | — | SSOT-24 | Public marking directory | |
| XC6217C322NR | — | SSOT-24 | Public marking directory | |
| XC6221C09BNR | — | SSOT-24 | Public marking directory | |
| ZD43V0 | — | SOD-322 | Public marking directory | |
| ZD5221BS2 | — | 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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