SMD marking code “4A” — 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 | |
|---|---|---|---|---|
| BC859A | INFINEON | SOT-23 | Public marking directory | |
| BGA6489 | INFINEON* | SOT-89 | Public marking directory | |
| FMMV109 | ZETEX | SOT-23 | Public marking directory | |
| HD3A | FERRANTI | — | Public marking directory | |
| MMBV109 | MOT | SOT23 | Public marking directory | |
| RQ5RW40AA | RICOH* | SOT-143R | Public marking directory | |
| D3FS4A | — | DO-214 | Public marking directory | |
| KIA7419F | — | SOT-89 | Public marking directory | |
| MA72 | — | SOD-123 | Public marking directory | |
| MMVL109 | — | SOD-323 | Public marking directory | |
| R3132Q50EA | — | SOT-143 | Public marking directory | |
| XC6127N15ENR | — | SSOT-24 | Public marking directory | |
| XC6213B40ANR | — | SSOT-24 | Public marking directory | |
| XC6221D181NR | — | 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.
Can't match your marking?
Send us the code, package and a photo — our team helps identify the part.
Ask our team