SMD marking code “18B” — 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 | |
|---|---|---|---|---|
| CMPZ5222B | CSC CENTRAL SEMIC.CORP. | SOT-23 16dc - 3a Cen | Public marking directory | |
| MMBZ5222B | DIODES | SOT-23 16dc - 3a,3c F,Mot | Public marking directory | |
| TLZ18B | VISHAY* | SOD-80 | Public marking directory | |
| AAT60018B-S15 | — | SOT-143 | Public marking directory | |
| AAT60018B-S16 | — | SOT-89 | Public marking directory | |
| AAT60018B-S2 | — | SOT-23 16vdb VD7 3d Aat | Public marking directory | |
| GLZ18B | — | SOD-80 | Public marking directory | |
| HMBZ5222B | — | SOT-23 16dc - 3a Hsn | Public marking directory | |
| PTZ18B | — | SOD-106 | Public marking directory | |
| ZD5222BN3 | — | SOT-23 | 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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