PNDS / Marking codes / NA

Identify an unknown SMD part: marking code “NA”

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.

23 candidates 10 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
2SC5374	TOS ^*	SMCP 16ta - 3a San	Public marking directory
2SC5375	TOS ^*	MCP 16ta - 3a San	Public marking directory
BF1105WR	PHI	SOT-343R	Public marking directory
BFS20	PHI	SOT-23 16ta - 3a Sil	Public marking directory
CFY35-20	INFINEON	MW-4	Public marking directory
FMMTA05R	ZETEX	SOT-23 16te - 3a Zx	Public marking directory
MIC1810-5U	MICREL ^*	SOT-23 16vda VD7 3a Mcr	Public marking directory
MIC1810-5UY	MICREL ^*	SOT-23 16vda VD7 3a Mcr	Public marking directory
MMBT100	FSC	SOT-23 16ta 3a F	Public marking directory
RN1443A	TOS	SOT-346 16ta - 3a Tos	Public marking directory
2SC5538	—	SSFP 18ta - 3a San	Public marking directory
2SK1273	—	SOT-89	Public marking directory
ETC1810-5U	—	SOT-23 16vdb VD7 3a Etc	Public marking directory
KRC101S	—	SOT-23 16ta - 3f Kec	Public marking directory
KRC401	—	SOT-323 16ta - 3f Kec	Public marking directory
KRC401E	—	SOT-490 18ta - 3f Kec	Public marking directory
KRC401V	—	VSM 18ta - 3f Kec	Public marking directory
PT7M6246NLC4	—	SC-70-4	Public marking directory
PT7M6246NLC4E	—	SC-70-4	Public marking directory
RP130Q301D	—	SC-82AB	Public marking directory
XC6120N40N	—	SSOT-24	Public marking directory
XC6127C16DNR	—	SSOT-24	Public marking directory
XC6223H201NR-G	—	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 “N”

N N0 N1 N2 N3 N4 N5 N6 N7 N8

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.