Compare the candidate package with the outline, pin count and polarity mark on the actual board.
SMD Marking
N21
Possible components matching this marking.A marking is not a guaranteed identification by itself.
5possible components
MEDIUMambiguity level
Filters5 candidates
Narrow the list using the package, manufacturer or component family printed on the board.
5 possible components
Results are ordered by the available marking evidence.
1 DDC 144TU2 evidence sources Unknown manufacturer (DII) smd1 TRANSISTOR HIGH2 sources SMD,DUAL NPN TRANSISTORS, 50V 100mA 200mW | Si-N+RManufacturer hint: Unknown manufacturer (DII) 2 DDTC 144VKA2 evidence sources Unknown manufacturer (DII) smd2 TRANSISTOR HIGH2 sources SMD, SMALL SIGNAL TRANSISTOR, 50V 100mA 200mW | Si-N+RManufacturer hint: Unknown manufacturer (DII) 3 DDTC 144VCA2 evidence sources Unknown manufacturer (DII) smd2 TRANSISTOR HIGH2 sources SMD, SMALL SIGNAL TRANSISTOR, 50V 100mA 200mW | Si-N+RManufacturer hint: Unknown manufacturer (DII) 4 DDTC 144VUA2 evidence sources Unknown manufacturer (DII) smd2 TRANSISTOR HIGH2 sources SMD, SMALL SIGNAL TRANSISTOR, 50V 100mA 200mW | Si-N+RManufacturer hint: Unknown manufacturer (DII) 5 DDTC 144VE2 evidence sources Unknown manufacturer (DII) smd2 TRANSISTOR HIGH2 sources SMD, SMALL SIGNAL TRANSISTOR, 50V 30mA 150mW | Si-N+RManufacturer hint: Unknown manufacturer (DII)
Safe identification
How to verify this result
Check the official datasheet for pinout, voltage, current and thermal ratings—not only the marking.
Do not treat a short marking, a low-confidence candidate or a family match as a drop-in replacement.