Compare the candidate package with the outline, pin count and polarity mark on the actual board.
SMD Marking
M31
Possible components matching this marking.A marking is not a guaranteed identification by itself.
3possible components
MEDIUMambiguity level
Filters3 candidates
Narrow the list using the package, manufacturer or component family printed on the board.
3 possible components
Results are ordered by the available marking evidence.
1 MC 9312 evidence sources Mitsubishi flach1 DIODE HIGH2 sources Dual, VC, S | Si-DiManufacturer hint: Mitsubishi 2 BSD 202 evidence sources Philips Semiconductors / Valvo smd1 FET HIGH2 sources SMD | MOS-N-FET-dManufacturer hint: Philips Semiconductors / Valvo 3 M 312 evidence sources Mitsubishi flach1 DIODE HIGH2 sources Dual, VC, S | Si-DiManufacturer hint: Mitsubishi
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.