PNDS / Marking codes / 15

Identify an unknown SMD part: marking code “15”

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 20 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
1PS59SB15	PHI	SC-59	Public marking directory
1PS59SB15	PHI	SC-59/SOT346	Public marking directory
BU4SU69G2	ROHM ^*	SSOP-5	Public marking directory
DTA124ECA	MCC	SOT-23	Public marking directory
DTA124EE	MCC	SOT-416	Public marking directory
DTA124EE	MCC	SOT-523	Public marking directory
DTA124EKA	RHM	SOT-346	Public marking directory
DTA124EUA	MCC	—	Public marking directory
DTA124EUA	MCC	SOT-323	Public marking directory
DTA143ECA	MCC	SOT-23	Public marking directory
MAZ8150	PANASONIC ^*	SC-76	Public marking directory
MAZS150	PANASONIC ^*	SC-79	Public marking directory
MAZS1500L	PANASONIC ^*	SC-79	Public marking directory
MMBD1505	NSC	SOT-23	Public marking directory
MMBT3960	MOT	—	Public marking directory
MUN5315DW1	MOT	SOT363	Public marking directory
P6SMBJ15	LITTLE ^*	DO-214AA	Public marking directory
R3111Q151B	RICOH ^*	SC-82AB	Public marking directory
RN5RF15AA	RICOH ^*	SOT-23-5	Public marking directory
UDZS11B	ROHM ^*	—	Public marking directory
CMBT9015	—	SOT-23	Public marking directory
DTA124EM	—	—	Public marking directory
EDZ11B	—	SOD-523	Public marking directory
KDZ15EV	—	SOD-523	Public marking directory
KDZ15V	—	SOD-323	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 “1”

10 11 12 13 14 16 18 1A 1B 1C

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.