SMD marking code “B1” — 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 | |
|---|---|---|---|---|
| 2SK1824 | TOS* | SOT-23 | Public marking directory | |
| BAS40 | NXP | SOT23 | Public marking directory | |
| BD4745G | ROHM* | — | Public marking directory | |
| BZX399-C1V8 | PHI | SOD-323 | Public marking directory | |
| BZX399-C1V8 | PHI | SC-76/SOD323 | Public marking directory | |
| BZX399C1V8 | PHI | SOD323 | Public marking directory | |
| FSS22 | SANYO* | DO-214AA | Public marking directory | |
| HSMS-2811 | HP | SOT23 | Public marking directory | |
| R3111N112A | RICOH* | SOT-23 | Public marking directory | |
| R3113D211A | RICOH* | — | Public marking directory | |
| R3114Q181A | RICOH* | SC-82AB | Public marking directory | |
| R5421N112C | RICOH* | SOT-23-6 | Public marking directory | |
| RT9169-12CV | RICHTEK TECHNOLOGY CORPORATION | SOT-23 | Public marking directory | |
| TC1015-2.5VRX | MIC* | SOT-23-5 | Public marking directory | |
| 2SC4931-1 | — | SMCP | Public marking directory | |
| AP432Y | — | SOT-89-3L | Public marking directory | |
| BAS40L | — | SOT-23 | Public marking directory | |
| BAS70PT | — | SC-59 16dc - 3a Chm | Public marking directory | |
| BZX884-C2V4 | — | SOD-882 | Public marking directory | |
| D71G.05T1 | — | SOT-89 | Public marking directory | |
| E1/E2 | — | — | Public marking directory | |
| ELM9711NAB | — | SOT-89 | Public marking directory | |
| ELM9831AB | — | SOT-89 | Public marking directory | |
| HVC355B | — | UFP | Public marking directory | |
| R1111N311A | — | SOT-23-5 | Public marking directory | |
| R1140Q211B | — | SOT-143R | Public marking directory | |
| R1160D111A | — | — | Public marking directory | |
| R1180Q211B | — | SC-82AB | Public marking directory | |
| R3130N21EC | — | SOT-23 | Public marking directory | |
| RN5VD11AA | — | SOT-23-5 | Public marking directory | |
| SDB310D | — | SOD-323 | Public marking directory | |
| UDZ2V0B | — | SOD-323 | Public marking directory | |
| XC6GC1102HR | — | USP-3 | 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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