PNDS / Marking codes / P4

Identify an unknown SMD part: marking code “P4”

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 15 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
BFR92R	PHI	SOT-23	Public marking directory
BZX84C15TS	DIODES	—	Public marking directory
CMOZ22L	CSC CENTRAL SEMIC.CORP.	SOD-523	Public marking directory
HVC134	OHMITE ^*	UFP	Public marking directory
ILC5061IC44X	FSC ^*	SC-70	Public marking directory
ILC5061M44X	FSC	SOT-23	Public marking directory
MMSZ5235B	FSC	SOD-123	Public marking directory
R3111Q441A	RICOH ^*	SC-82AB	Public marking directory
R3116Q411A	RICOH ^*	SC-82AB	Public marking directory
SST204	SILICONIX-VISHAY	SOT-23	Public marking directory
TC54VN4402ECB	MIC ^*	SOT-23	Public marking directory
TC54VN4402MB	MIC ^*	SOT-89	Public marking directory
TK11240M	TOKO	SOT-23L-6	Public marking directory
TK11245M	TOKO	SOT-23L-6	Public marking directory
TK11247M	TOKO	SOT-23L-6	Public marking directory
2SD1161-P4	—	SOT-23	Public marking directory
BZX84-C15T	—	SOT-523	Public marking directory
BZX84-C15TS	—	SOT-363	Public marking directory
ELM7624HCB	—	SOT-23 16vdc VD7 3d Elm	Public marking directory
ELM9724CAB	—	SOT-89	Public marking directory
KA4F3M	—	SC-75	Public marking directory
KRA117S	—	SOT-23	Public marking directory
KRA317	—	SOT-323	Public marking directory
KRA317E	—	SOT-490	Public marking directory
KRA317V	—	—	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 “P”

PK7 PR7 P0 P1 P2 P3 P5 P6 P7 P8

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.