PNDS / Marking codes / DN

Identify an unknown SMD part: marking code “DN”

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 13 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
2SD1999	PANASONIC ^*	PCP	Public marking directory
AIC1647CJ	AIC ^*	—	Public marking directory
BD4832FVE	ROHM ^*	VSOF-5	Public marking directory
BD4832G	ROHM ^*	SSOP-5	Public marking directory
DMN2005LPK	DIODES	—	Public marking directory
MAX6314US29D2-T	MAX ^*	SOT-143	Public marking directory
MMBZ4703	VISHAY ^*	SOT-23	Public marking directory
MMSZ4703	FSC	SOD-123	Public marking directory
P6SMBJ70C	LITTLE ^*	DO-214AA	Public marking directory
R3112Q321C	RICOH ^*	SC-82AB	Public marking directory
UNR31AF	PANASONIC ^*	—	Public marking directory
XC61119C30ANR-G	TOREX ^*	SSOT-24 26gh VD3 5c Tor	Public marking directory
XC6119C30ANR	TOREX ^*	SSOT-24	Public marking directory
AAT3526ICX-2.63-200	—	SOT-143	Public marking directory
AP131-28TW	—	—	Public marking directory
AP131-28W	—	SOT-23-5L	Public marking directory
AP131-28Y	—	SOT-89-5L	Public marking directory
BZX384-C36	—	SOD-323	Public marking directory
P4SMA160A	—	DO-214AC	Public marking directory
R5220D221B	—	—	Public marking directory
RT9809-37CV	—	SOT-23 16vdc VD7 3a Rct	Public marking directory
SM6T10	—	DO-214AA	Public marking directory
SiP809CJEUADT	—	SOT-23	Public marking directory
TCUDZS27VB	—	SOD-323F	Public marking directory
TV06B700KB	—	DO-214AA	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 “D”

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9

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.