**BUG** Concise problem statement: The "Source" and "Drain" pads on the PCB layout are reversed from what the data sheet says. The part is an enhancement mode MOSFET. AO3401A made by Alpha and Omega. LCSC part Number: C15127 This has caused me to have to figure out how to fix my boards as all my transistors now come on all the time??? You can see this by: a. add a LCSC part to the schematic and do a search under transitors for AO3401A. It pops up and gives a nice schematic symbol. b. Add the part and wire it to a few things. c. Convert to PCB. d. Check the result against the part data sheet as found on LCSC.