PNDS / Marking codes / DM

Identify an unknown SMD part: marking code “DM”

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 11 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
2SD1998	PANASONIC ^*	—	Public marking directory
2SD2170	PANASONIC ^*	SOT-89	Public marking directory
AIC1648CK	AIC ^*	—	Public marking directory
BD4831FVE	ROHM ^*	VSOF-5	Public marking directory
BD4831G	ROHM ^*	SSOP-5	Public marking directory
DMN2005LP4K	DIODES	—	Public marking directory
DMN2100UDM	DIODES	—	Public marking directory
MAX6314US30D2-T	MAX ^*	SOT-143	Public marking directory
MMBZ4702	VISHAY ^*	SOT-23	Public marking directory
P6SMBJ64AC	LITTLE ^*	DO-214AA	Public marking directory
R3112Q311C	RICOH ^*	SC-82AB	Public marking directory
2SB1026-M	—	SOT-89	Public marking directory
2SB798-M	—	SOT-89	Public marking directory
AP131-27TW	—	—	Public marking directory
AP131-27W	—	SOT-23-5L	Public marking directory
AP131-27Y	—	SOT-89-5L	Public marking directory
BZX384-C33	—	SOD-323	Public marking directory
CD214B-T64CA	—	DO-214AA	Public marking directory
MMSZ4702	—	SOD-123	Public marking directory
MMSZ4717	—	SOD-123	Public marking directory
P4SMA160	—	DO-214AC	Public marking directory
R5220D211B	—	—	Public marking directory
RT9809-36CV	—	SOT-23 16vdc VD7 3a Rct	Public marking directory
SiP809CTEUADT	—	SOT-23	Public marking directory
TCUDZS24VB	—	SOD-323F	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.