PNDS / Marking codes / PB

Identify an unknown SMD part: marking code “PB”

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.

24 candidates 10 with manufacturer source-traceable

Candidate part numbers

Part number	Manufacturer	Package	Mapping source
2SC3295-B	TOS	SC-59	Public marking directory
2SC4666B	TOS	SOT-323	Public marking directory
BB152	NXP	SOD-323	Public marking directory
BD5241FVE	ROHM ^*	VSOF-5	Public marking directory
BD5241G	ROHM ^*	SSOP-5	Public marking directory
BH18RB1WGUT	ROHM ^*	—	Public marking directory
BZX84C30TS	DIODES	—	Public marking directory
MA2Q736	PANASONIC ^*	DO-214	Public marking directory
R1114Q211B	RICOH ^*	SOT-143R	Public marking directory
TC1278-10ENB	MIC ^*	SOT-23	Public marking directory
2PA1774QM	—	SOT-883 22ta - 2a Phi	Public marking directory
2SJ197	—	SOT-89	Public marking directory
BZX84-C30T	—	SOT-523	Public marking directory
DCG10	—	PCP	Public marking directory
KDZ6.8B	—	—	Public marking directory
KRA102S	—	SOT-23	Public marking directory
KRA302	—	SOT-323	Public marking directory
KRA302E	—	SOT-490	Public marking directory
KRA302V	—	—	Public marking directory
R1225N252B	—	SOT-23-6W 33so	Public marking directory
RP130Q411D	—	SC-82AB	Public marking directory
XC6127C18ENR	—	SSOT-24	Public marking directory
XC6218P12N	—	SSOT-24	Public marking directory
XC6224B19BNR	—	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 “P”

PK7 PR7 P0 P1 P2 P3 P4 P5 P6 P7

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.