PNDS / Marking codes / R2

Identify an unknown SMD part: marking code “R2”

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 22 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
2SC2351-2	NEC ^*	SOT-23	Public marking directory
2SC2351-P	NEC ^*	SOT-23	Public marking directory
2SC2351P	NEC	SOT23	Public marking directory
2SC4225	NEC	SOT323	Public marking directory
2SC4225-2	NEC ^*	SOT-323	Public marking directory
BFR93A	PHI	SOT23	Public marking directory
BFR93AT	INFINEON	SOT-416	Public marking directory
BFR93AW	PHI	SOT-323	Public marking directory
BZX84C5V1TS	DIODES	—	Public marking directory
CMOZ47L	CSC CENTRAL SEMIC.CORP. ^*	SOD-523	Public marking directory
MBR0530	MCC	SOD-123	Public marking directory
PDZ2.7B	NXP	SOD-323	Public marking directory
R1121N221B	RICOH ^*	SOT-23-5	Public marking directory
R3111Q521A	RICOH ^*	SC-82AB	Public marking directory
R3116Q091C	RICOH ^*	SC-82AB	Public marking directory
R5426D124CA	RICOH ^*	—	Public marking directory
R5426N124CA	RICOH ^*	SOT-23-6	Public marking directory
TC54VN5202ECB	MIC ^*	SOT-23	Public marking directory
TC54VN5202MB	MIC ^*	SOT-89	Public marking directory
TC7SZ08AFE	TOS	SC-75	Public marking directory
TK11420M	TOKO	SOT-23L-6	Public marking directory
TK11425M	TOKO	SOT-23L-6	Public marking directory
BFR93AL	—	SOT-23	Public marking directory
BZX84-C5V1T	—	SOT-523	Public marking directory
D71Y.8T1	—	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 “R”

R1 R3 R4 R5 R6 R7 RHM RE RB R8

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.