PNDS / Marking codes / 6P

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

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.

22 candidates 13 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
BCX71HR	FERRANTI	SOT-23	Public marking directory
BCX71RH	SIEMENS	SOT-23	Public marking directory
CMDZ30L	CSC CENTRAL SEMIC.CORP.	SOD-323	Public marking directory
DTA144WE	ROHM	SC-75	Public marking directory
KIA7042AF	KEC ^*	SOT-89	Public marking directory
KIA7042AT	KEC ^*	—	Public marking directory
MMBFJ111	FSC	—	Public marking directory
MMBFJ113	FS	—	Public marking directory
RQ5RW17CA	RICOH ^*	SOT-143R	Public marking directory
UMZ16N	ROHM ^*	SOT-323 16df - 3i Rhm	Public marking directory
UNR211H	PANASONIC ^*	SC-59	Public marking directory
UNR511K	PANASONIC ^*	SOT-523	Public marking directory
UNR911KJ	PANASONIC ^*	SC-89	Public marking directory
MUN2137	—	SC-59	Public marking directory
MUN5137	—	SOT-323	Public marking directory
R3133Q23EC	—	SOT-143	Public marking directory
UN211H	—	SC-59	Public marking directory
UN511K	—	SOT-523	Public marking directory
UN911KJ	—	SC-89	Public marking directory
XC6127C37BNR	—	SSOT-24	Public marking directory
XC6127N37GNR	—	SSOT-24	Public marking directory
XC6221D29BNR	—	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”

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

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.