SMD marking code “51” — 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 | |
|---|---|---|---|---|
| BAT15-115R | INFINEON | SOT173 | Public marking directory | |
| BAT15-115S | INFINEON | SOT173 | Public marking directory | |
| BAV199 | DIODES | — | Public marking directory | |
| CMZ51 | TOS | — | Public marking directory | |
| P6SMBJ51 | LITTLE* | DO-214AA | Public marking directory | |
| R3111Q511B | RICOH* | SC-82AB | Public marking directory | |
| RN5RF51AA | RICOH* | SOT-23-5 | Public marking directory | |
| RN5RZ51AA | RICOH* | SOT-23-5 | Public marking directory | |
| CHDTC114YMPT | — | SOT-723 18ta - 3a Chm | Public marking directory | |
| ELM9851BB | — | SOT-23 16cg VR1 3d Elm | Public marking directory | |
| GLZ51 | — | SOD-80 | Public marking directory | |
| Gali-51 | — | SOT-89 | Public marking directory | |
| HMSZ5251B | — | SOD-323 | Public marking directory | |
| HZC5.1 | — | SOD-523 | Public marking directory | |
| HZU5.1G | — | SOD-323 | Public marking directory | |
| KDZ5.1EV | — | SOD-523 | Public marking directory | |
| KDZ5.1V | — | SOD-323 | Public marking directory | |
| MAZY510 | — | NMiniP2 | Public marking directory | |
| R1223N322F | — | SOT-23-5 | Public marking directory | |
| SML4757 | — | DO-214 | Public marking directory | |
| TCMM5Z2V7 | — | SOD-523 | Public marking directory | |
| U1Z51 | — | SOD-6 | Public marking directory | |
| U1ZB51 | — | I-FLAT | Public marking directory | |
| XC6221D391NR | — | SSOT-24 | Public marking directory | |
| ZD5251BS2 | — | 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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