PNDS / Marking codes / F0

Identify an unknown SMD part: marking code “F0”

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 11 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
BZX585-C5V6	PHI	SOD-523	Public marking directory
BZX84C68	NXP	SOT-23 16dc - 3a Lge	Public marking directory
CMOZ5V6	CSC CENTRAL SEMIC.CORP. ^*	SOD-523	Public marking directory
HSMP-3820	AGILENT	SOT-23	Public marking directory
R3111N502A	RICOH ^*	SOT-23	Public marking directory
R3113D201C	RICOH ^*	—	Public marking directory
R3114Q071C	RICOH ^*	SC-82AB	Public marking directory
R5421N177C	RICOH ^*	SOT-23-6	Public marking directory
TC1073-4.0VCH	MIC ^*	SOT-23-6	Public marking directory
TC54VC5002ECB	MIC ^*	SOT-23	Public marking directory
TC54VC5002MB	MIC ^*	SOT-89	Public marking directory
ELM7620HBB	—	SOT-23 16vdc VD7 3d Elm	Public marking directory
ELM9750NAB	—	SOT-89	Public marking directory
R1111N201B	—	SOT-23-5	Public marking directory
R1140Q201D	—	SOT-143R	Public marking directory
R1160D101B	—	—	Public marking directory
R1180Q301C	—	SC-82AB	Public marking directory
RN5VD50AA	—	SOT-23-5	Public marking directory
RT9808-16CV	—	SOT-23 16vdb VD6 3a Rct	Public marking directory
Si91844DT-26	—	SOT-23-5	Public marking directory
XC61CC5002M	—	SOT-23	Public marking directory
XC61CC5002N	—	SOT-143R	Public marking directory
XC61CC5002P	—	SOT-89	Public marking directory
XC6221B311N	—	SSOT-24 26vn VR4 5a Tor	Public marking directory
XC6221B311NR	—	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 “F”

F F1 F2 F3 F4 F5 F6 F7 F8 F9

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.