SMD marking code “BU” — 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 | |
|---|---|---|---|---|
| 2SD1005-U | NEC* | SOT-89 | Public marking directory | |
| BAT54 | FSC | SOD-123 | Public marking directory | Request quote |
| BCX71GR | FERRANTI | SOT-23 | Public marking directory | |
| BCX71RG | SIEMENS | SOT-23 | Public marking directory | |
| BD4739G | ROHM* | — | Public marking directory | |
| BZX399-C27 | PHI | SOD-323 | Public marking directory | |
| BZX399-C27 | PHI | SC-76/SOD323 | Public marking directory | |
| BZX399C27 | PHI | SOD323 | Public marking directory | |
| DA228K | ROHM* | SOT-346 | Public marking directory | |
| DA228U | ROHM* | SOT-323 | Public marking directory | |
| P6SMBJ20C | LITTLE* | DO-214AA | Public marking directory | |
| R1112N381A | RICOH* | SOT-23-5 | Public marking directory | |
| R3112Q181C | RICOH* | SC-82AB | Public marking directory | |
| R5421N163F | RICOH* | SOT-23-6 | Public marking directory | |
| XC61119C15ANR-G | TOREX* | SSOT-24 26gh VD3 5c Tor | Public marking directory | |
| XC6119C15ANR | TOREX* | SSOT-24 | Public marking directory | |
| Anode1 | — | — | Public marking directory | |
| BZT52H-C27 | — | SOD123F | Public marking directory | |
| P4SMA36 | — | DO-214AC | Public marking directory | |
| RT9169-38CV | — | SOT-23 | Public marking directory | |
| RT9169-39CX | — | SOT-89 | Public marking directory | |
| TV04A200K | — | DO-214AC | Public marking directory | |
| TV06B200KB | — | DO-214AA | Public marking directory | |
| UDZ33B | — | SOD-323 | Public marking directory | Request quote |
| XC6109C15AN | — | SSOT-24 | Public marking directory | |
| XC6127C45GNR | — | SSOT-24 | Public marking directory | |
| XC6127N46BNR | — | SSOT-24 | Public marking directory | |
| XC6221B261N | — | SSOT-24 26vn VR4 5a Tor | Public marking directory | |
| XC6221B261NR | — | 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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