PNDS / Marking codes / 8N

Identify an unknown SMD part: marking code “8N”

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 11 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
CMDZ2L0	CSC CENTRAL SEMIC.CORP. ^*	SOD-323	Public marking directory
DTC115EE	ROHM	SC-75	Public marking directory
MMBZ5238B	FSC	SOT-23	Public marking directory
NJM78L20A	NJR NEW-JAPAN-RADIO	SOT89	Public marking directory
NJM78L20UA	NJR	SOT-89	Public marking directory
R3111N581C	RICOH ^*	SOT-23-5	Public marking directory
TMPZ5238	TOS ^*	SOT-23	Public marking directory
TMPZ5238R	TOS ^*	SOT-23R	Public marking directory
UNR221E	PANASONIC ^*	SC-59	Public marking directory
UNR521E	PANASONIC ^*	SOT-523	Public marking directory
UNR921EJ	PANASONIC ^*	SC-89	Public marking directory
CMBZ5238B	—	SOT-23	Public marking directory
HMBZ5238B	—	SOT-23	Public marking directory
MUN2236	—	SC-59	Public marking directory
MUN5236	—	SOT-323	Public marking directory
R3133Q42EC	—	SOT-143	Public marking directory
SMBZ5238B	—	SOT-23 16dc - 3a Sur	Public marking directory
UN221E	—	SC-59	Public marking directory
UN521E	—	SOT-523	Public marking directory
UN921EJ	—	SC-89	Public marking directory
XC6127C35DNR	—	SSOT-24	Public marking directory
XC6127N35JNR	—	SSOT-24	Public marking directory
XC6223A30BNR-G	—	SSOT-24	Public marking directory
ZD5238BN3	—	SOT-23	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 “8”

8A 8B 8C 8D 8E 8F 8H 8K 8L 8P

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.