SMD marking code “4D” — 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 | |
|---|---|---|---|---|
| BC859B | PHI | SOT23 | Public marking directory | |
| HD3A | FERRANTI | SOT-23 | Public marking directory | |
| MMBV3401 | MOT | SOT23 | Public marking directory | |
| MMSZ2V7 | ON* | SOD-123 | Public marking directory | |
| R3111N341A | RICOH* | SOT-23-5 | Public marking directory | |
| RH5RL44AA | RICOH* | SOT-89 | Public marking directory | |
| RN5RL44AA | RICOH* | SOT-23-5 | Public marking directory | |
| RN5VD34CA | RICOH* | SOT-23-5 | Public marking directory | |
| RQ5RW43AA | RICOH* | SOT-143R | Public marking directory | |
| UNRF1AA | PANASONIC* | ML3 22ta - 2b Pan | Public marking directory | |
| 2SJ146 | — | SOT-23 | Public marking directory | |
| KIA7425F | — | SOT-89 | Public marking directory | |
| MA81 | — | SOD-123 | Public marking directory | |
| MM1Z2V7 | — | SOD-123 | Public marking directory | |
| MMVL3401 | — | SOD-323 | Public marking directory | Request quote |
| R3131N44EC | — | SOT-23 | Public marking directory | |
| USCD024 | — | 0603 | Public marking directory | |
| VR1 | — | — | Public marking directory | |
| XC6127N21ENR | — | SSOT-24 | Public marking directory | |
| XC6213B43ANR | — | SSOT-24 | Public marking directory | |
| XC6221D211NR | — | 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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