PNDS / Marking codes / 6M

Identify an unknown SMD part: marking code “6M”

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.

18 candidates 11 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
DTA123JE	MCC	SC-75	Public marking directory
FMMV2108	ZETEX	SOT-23	Public marking directory
KIA7036AF	KEC ^*	SOT-89	Public marking directory
KIA7036AT	KEC ^*	—	Public marking directory
MMBF5485	FSC	SOT-23	Public marking directory
R3111N461C	RICOH ^*	SOT-23-5	Public marking directory
RH5RE56AA	RICOH ^*	SOT-89	Public marking directory
RQ5RW19CA	RICOH ^*	SOT-143R	Public marking directory
UNR211D	PANASONIC ^*	SC-59	Public marking directory
UNR511D	PANASONIC ^*	SOT-523	Public marking directory
UNR911DJ	PANASONIC ^*	SC-89	Public marking directory
R3133Q21EC	—	SOT-143	Public marking directory
UN211D	—	SC-59	Public marking directory
UN511D	—	SOT-523	Public marking directory
UN911DJ	—	SC-89	Public marking directory
XC6127C33BNR	—	SSOT-24	Public marking directory
XC6127N33GNR	—	SSOT-24	Public marking directory
XC6221D27BNR	—	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 “6”

6A 6B 6C 6D 6E 6F 6H 6K 6G 6L

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.