PNDS / Marking codes / D5

Identify an unknown SMD part: marking code “D5”

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 17 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
2SA1252-5	TOS ^*	SOT-23	Public marking directory
AZ23C3V9	DIODES	SOT-23	Public marking directory
BCW32R	PHI	SOT-23R	Public marking directory
BZX384-C5V1	PHI	SOD-323	Public marking directory
MMBD4148CC	FS	SOT-23	Public marking directory
MMBZ5230B	FSC	SOT-23	Public marking directory
MMBZ5230BW	DIODES	SOT-323	Public marking directory
MMSZ5230B	FSC	SOD-123	Public marking directory
MMSZ5245B	FSC	SOD-123	Public marking directory
R3111N352A	RICOH ^*	SOT-23	Public marking directory
R3113D451A	RICOH ^*	—	Public marking directory
R3114Q421A	RICOH ^*	SC-82AB	Public marking directory
RN2906AFS	TOS ^*	—	Public marking directory
RN5VD35AA	RICOH ^*	SOT-23-5	Public marking directory
SST215	SILICONIX-VISHAY	SOT-143	Public marking directory
TC54VC3502ECB	MIC ^*	SOT-23	Public marking directory
TC54VC3502MB	MIC ^*	SOT-89	Public marking directory
2SA1687-5	—	—	Public marking directory
3T130AB	—	DO-214AA	Public marking directory
AP131-46TW	—	—	Public marking directory
AP131-46W	—	SOT-23-5L	Public marking directory
AP131-46Y	—	SOT-89-5L	Public marking directory
AX1110R50	—	SOT-23L 16vl VR1 3b Axl	Public marking directory
BC847BM	—	SOT-883 22ta - 2a PhH	Public marking directory
BZX884-C24	—	SOD-882	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 D6 D7 D8 D9 DA

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.