PNDS / Marking codes / N4

Identify an unknown SMD part: marking code “N4”

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.

25 candidates 15 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
BFQ540	NXP	SOT-89	Public marking directory
BFR53R	MUL	SOT-23	Public marking directory
CMOZ8L2	CSC CENTRAL SEMIC.CORP.	SOD-523	Public marking directory
DDTC113TUA	DIODES	—	Public marking directory
ILC5061IC34X	FSC ^*	SC-70	Public marking directory
ILC5061M34X	FSC	SOT-23	Public marking directory
MMBC1653N4	MOT	SOT-23	Public marking directory
MMSZ5234B	FSC	SOD-123	Public marking directory
R1121N441A	RICOH ^*	SOT-23-5	Public marking directory
R3111N542C	RICOH ^*	SOT-23	Public marking directory
R3111Q341A	RICOH ^*	SC-82AB	Public marking directory
R3116Q311A	RICOH ^*	SC-82AB	Public marking directory
RN5RY541A	RICOH ^*	SOT-23-5	Public marking directory
TC54VN3402ECB	MIC ^*	SOT-23	Public marking directory
TC54VN3402MB	MIC ^*	SOT-89	Public marking directory
2SC1653-4	—	SOT-23	Public marking directory
AP139-28TW	—	—	Public marking directory
AP139-28W	—	SOT-23-5L	Public marking directory
BFG520W/X	—	SOT-343	Public marking directory
BZX384-B47	—	SOD-323	Public marking directory
ELM7644LAB	—	SOT-23 16vdc VD7 3d Elm	Public marking directory
KA4L4Z	—	SC-75	Public marking directory
KRC117S	—	SOT-23	Public marking directory
KRC417	—	SOT-323	Public marking directory
KRC417E	—	SOT-490	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 N5 N6 N7 N8 N9

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.