PNDS / Marking codes / C3

Identify an unknown SMD part: marking code “C3”

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 25 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
1PS302	PHI	SOT-323	Public marking directory
1SS226	MCC	SOT-23	Public marking directory
1SS302	TOS	SOT-323	Public marking directory
1SS362	TOS	SOT-23	Public marking directory
2PD601ART	NXP	SOT-23 16ta - 3a PhH	Public marking directory
BFQ23C	PHI	SOT173	Public marking directory
BZX585-B3V0	PHI	SOD-523	Public marking directory
BZX79-C2V7	PHI	SOD27 (DO35)	Public marking directory
HSMS-2823	AGILENT	SOT-23	Public marking directory
HSMS-282E	AGILENT	SOT-323	Public marking directory
ILC5062IC23X	FSC ^*	SC-70	Public marking directory
ILC5062M23X	FSC ^*	SOT-23	Public marking directory
KST4126	FSC	SOT-23	Public marking directory
LM4898ITL	NSC	BGA-9	Public marking directory
LM4898ITLX	NSC	BGA-9	Public marking directory
MMBT4126	FSC	SOT-23	Public marking directory
MMBZ5223B	DIODES	SOT-23	Public marking directory
MMBZ5223BW	DIODES	SOT-323	Public marking directory
MMSZ5223B	DIODES	SOD-123	Public marking directory
MMSZ5223BS	DIODES	SOD-323	Public marking directory
MMSZ5223BS	DIODES	—	Public marking directory
MMSZ5225B	DIODES	—	Public marking directory
MMSZ5225B	MCC	SOD-123	Public marking directory
MMXZ5223B	MCC	SOD-323	Public marking directory
R3111N232A	RICOH ^*	SOT-23	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 “C”

C0 C1 C2 C4 C5 C6 C7 C8 C9 CA

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.