PNDS / Marking codes / F8

Identify an unknown SMD part: marking code “F8”

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 13 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
BZX585-C4V7	PHI	SOD-523	Public marking directory
BZX84C3V3	FSC	SOT-23 16dc - 3a Lge	Public marking directory
CMOZ4V7	CSC CENTRAL SEMIC.CORP. ^*	SOD-523	Public marking directory
MC78PC28N	ON ^*	SOT-23-5	Public marking directory
MM5Z4V3	FSC	SOD-523	Public marking directory
R1111N281B	RICOH	SOT-23-5	Public marking directory
R3111N582A	RICOH ^*	SOT-23	Public marking directory
R3113D281C	RICOH ^*	—	Public marking directory
R3114Q151C	RICOH ^*	SC-82AB	Public marking directory
RN1909FS	TOS	—	Public marking directory
TC1073-2.85VCH	MIC ^*	SOT-23-6	Public marking directory
TC54VC5802ECB	MIC ^*	SOT-23	Public marking directory
TC54VC5802MB	MIC ^*	SOT-89	Public marking directory
ELM7628HBB	—	SOT-23 16vdc VD7 3d Elm	Public marking directory
ELM9818AB	—	SOT-89	Public marking directory
R1131D081A	—	—	Public marking directory
R1140Q281D	—	SOT-143R	Public marking directory
R1160D181B	—	—	Public marking directory
R3130N18EA	—	SOT-23	Public marking directory
RN5VD58AA	—	SOT-23-5	Public marking directory
RT9808-35CV	—	SOT-23 16vdb VD6 3a Rct	Public marking directory
Si91844DT-22	—	SOT-23-5	Public marking directory
XC61CC5802M	—	SOT-23	Public marking directory
XC61CC5802N	—	SOT-143R	Public marking directory
XC61CC5802P	—	SOT-89	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 F0 F1 F2 F3 F4 F5 F6 F7 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.