SMD marking code “1A” — 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 | |
|---|---|---|---|---|
| BC846A | PHI | SOT-23 | Public marking directory | |
| BC846AS | DIODES | — | Public marking directory | |
| BC846AT | PHI | SOT-416 | Public marking directory | |
| BC846AT | PHI | SC-75/ SOT416 | Public marking directory | |
| BC846AW | PHI | SOT-323 16ta - 3a PhH | Public marking directory | |
| BC846B | MCC | SOT-23 | Public marking directory | |
| BU4341F | ROHM* | SOP-4 | Public marking directory | |
| BU4341FWE | ROHM* | VSOF-5 | Public marking directory | |
| BU4341G | ROHM* | SSOP-5 | Public marking directory | |
| FMMT3904 | FERRANTI | SOT-23 | Public marking directory | |
| IRLML2402 | IR | SOT-23 | Public marking directory | |
| KST3904 | SMG | SOT-23 | Public marking directory | |
| MM5Z47V | FSC | SOD-523 | Public marking directory | |
| MMBT3904 | FSC | SOT-23 | Public marking directory | |
| PXT3904 | PHI | SOT-89 | Public marking directory | |
| RQ5RW60BA | RICOH* | SOT-143R | Public marking directory | |
| SMBT3904 | SIEMENS | SOT-23 16ta - 3a Inf | Public marking directory | |
| SXT3904 | INFINEON | SOT-89 | Public marking directory | |
| YTS3904 | TOS | SOT-23 | Public marking directory | |
| 2T664A9 | — | SOT-89 | Public marking directory | |
| CMBT3904 | — | SOT-23 | Public marking directory | |
| MA110 | — | SOD-123 | Public marking directory | |
| MM3Z47V | — | SOD-323 | Public marking directory | |
| R1161D121A5 | — | — | Public marking directory | |
| R3132Q20EA | — | SOT-143 | Public marking directory | |
| R5326N001A | — | SOT-23-6 | Public marking directory | |
| TMPT3904 | — | SOT-23 | Public marking directory | |
| XC6127N15BNR | — | SSOT-24 | Public marking directory | |
| XC6217C112NR | — | SSOT-24 | Public marking directory | |
| XC6221C481NR | — | SSOT-24 | Public marking directory | |
| ZD47V0 | — | SOD-322 | 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