SMD marking code “BY” — 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 | |
|---|---|---|---|---|
| 2SA1200-Y | TOS* | SOT-89 | Public marking directory | |
| 2SC4396 | TOS* | SOT-323 | Public marking directory | |
| 2SC5342U-Y | TOS* | SOT-323 16ta - 3a Auk | Public marking directory | |
| 2SC5342UF-Y | TOS* | SOT-323F 18ta - 3a Auk | Public marking directory | |
| BCW71KR | PHI | SOT23R | Public marking directory | |
| BCX71RK | SIEMENS | SOT-23 | Public marking directory | |
| BD4743G | ROHM* | — | Public marking directory | |
| BZX399-C39 | PHI | SOD-323 | Public marking directory | |
| BZX399-C39 | PHI | SC-76/SOD323 | Public marking directory | |
| BZX399C39 | PHI | SOD323 | Public marking directory | |
| MMBZ5255B | FS | SOT-23 16dc - 3a Lge | Public marking directory | |
| P6SMBJ24C | LITTLE* | DO-214AA | Public marking directory | |
| R5421N151F | RICOH* | SOT-23-6 | Public marking directory | |
| TC1015-1.8VRX | MIC* | SOT-23-5 | Public marking directory | |
| XC61119C18ANR-G | TOREX* | SSOT-24 26gh VD3 5c Tor | Public marking directory | |
| XC6119C18ANR | TOREX* | SSOT-24 | Public marking directory | |
| 2SC3395 | — | CP 16ta - 3a San | Public marking directory | |
| 2SK1334 | — | SOT-89 | Public marking directory | |
| BZT52H-C39 | — | SOD123F | Public marking directory | |
| Cathode1 | — | — | Public marking directory | |
| GS6332UR19D1 | — | SOT-23 | Public marking directory | |
| KTA1660-Y | — | SOT-89 | Public marking directory | |
| MMSZ4690 | — | SOD-123 | Public marking directory | |
| P4SMA43 | — | DO-214AC | Public marking directory | |
| RT9169-42CV | — | SOT-23 | Public marking directory | |
| RT9169-43CX | — | SOT-89 | Public marking directory | |
| SiP6332R19D1 | — | SOT-23 | Public marking directory | |
| TV04A240K | — | DO-214AC | Public marking directory | |
| TV06B240KB | — | DO-214AA | Public marking directory | |
| UDZ47B | — | SOD-323 | Public marking directory | |
| XC6109C18AN | — | SSOT-24 | Public marking directory | |
| XC6127C51GNR | — | SSOT-24 | Public marking directory | |
| XC6127N52BNR | — | SSOT-24 | Public marking directory | |
| XC6221B291N | — | SSOT-24 26vn VR4 5a Tor | Public marking directory | |
| XC6221B291NR | — | 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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