PNDS / Marking codes / 1H

Identify an unknown SMD part: marking code “1H”

Packages rarely print the full part number. The marking below is shared by several part numbers — use the package, pin count and the manufacturer family together to narrow it down, then confirm against the datasheet.

24 candidates 10 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
2SK0123	PANASONIC ^*	Mini3-G1 16fj - 3a Pan	Public marking directory
BC847	PHI	SOT-23	Public marking directory
BC847W	NEXPERIA	SOT-323 16ta - 3a PhH	Public marking directory
BU4348F	ROHM ^*	SOP-4	Public marking directory
BU4348FWE	ROHM ^*	VSOF-5	Public marking directory
BU4348G	ROHM ^*	SSOP-5	Public marking directory
FMMT-A05	FERRANTI	—	Public marking directory
KST05	FSC	SOT-23	Public marking directory
MMBTA05	DIODES	SOT-23	Public marking directory
SMBTA05	SIEMENS	SOT-23 16ta - 3a Inf	Public marking directory
2SK123	—	Mini3-G1 16fj - 3a Pan	Public marking directory
2SK1860	—	Minit3-F1 16fj - 3a Pan	Public marking directory
CMBTA05	—	SOT-23	Public marking directory
CMBTA13	—	SOT-23	Public marking directory
FMMTA05	—	SOT-23	Public marking directory
MM3Z3V6	—	SOD-323	Public marking directory
R1161D311B	—	—	Public marking directory
R3131N31EA	—	SOT-23	Public marking directory
R3132Q27EA	—	SOT-143	Public marking directory
R5326N008A	—	SOT-23-6	Public marking directory
TMPTA05	—	SOT-23	Public marking directory
XC6127N27BNR	—	SSOT-24	Public marking directory
XC6213B16ANR	—	SSOT-24	Public marking directory
XC6217C172NR	—	SSOT-24	Public marking directory

How we narrow this down

Package first — SOT-23 vs SOD-123 vs SC-59 eliminates most candidates immediately.
Pin count and body size — a 3-pin SOT-23 LDO cannot be a 6-pin dual transistor.
Marking style — laser-marked parts are usually newer production; ink marking often indicates older or second-source vendors.
Circuits around it — a part sitting on a rail with an inductor is a regulator, not a diode.
Datasheet check — every credible candidate lists its marking scheme in the “marking information” section.

FAQ

Same code, several parts — which one do I actually have? Compare package + pin count + surrounding circuit; if it still fits two parts, request a sample verification before production.
Can I substitute between the candidates? No — the same marking may sit on electrically different parts. Always match the electrical spec sheet, not just the marking.
Where do these mappings come from? Public SMD marking directories and historical stock tables; each row keeps its source so you can trace it.

Other codes starting with “1”

10 11 12 13 14 15 16 18 1A 1B

Still not sure what the part is?

Send the code, package and a photo through the BOM hub — our engineers cross-check it against datasheets and sourcing records.

How these mappings are compiled: public SMD marking directories plus our own stock records. Each row keeps its original reference internally, so any mapping can be traced on request. ^* Manufacturer derived from the part-number family (some directory entries carry no manufacturer) — treat it as a lead, not a datasheet fact. Markings are indicative only — confirm with the physical batch marking and the original datasheet before ordering.