Compare the candidate package with the outline, pin count and polarity mark on the actual board.
SMD Marking
S20
Possible components matching this marking.A marking is not a guaranteed identification by itself.
2possible components
LOWambiguity level
Filters2 candidates
Narrow the list using the package, manufacturer or component family printed on the board.
2 possible components
Results are ordered by the available marking evidence.
1 DDC 144NS2 evidence sources Unknown manufacturer (DII) smd1 TRANSISTOR HIGH2 sources SMD, PRE-BIASED TRANSISTOR, 50V 100mA 200mW | Si-N+RManufacturer hint: Unknown manufacturer (DII) 2 HSM 276 ASR2 evidence sources Hitachi / Renesas Electronics smd2 DIODE HIGH2 sources SMD, Schottky Dual, CATV-T-M | Si-DiManufacturer hint: Hitachi / Renesas Electronics
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.