4 layers49.6 × 49 mm

Boards in 2 GitHub repositories, designed in KiCad, that use the M28S by ALJ (-55℃~+150℃ 1 NPN 1000 100MHz 100nA 1A 200mW 20V 550mV 6V NPN SOT-23 Bipolar (BJT) ROHS). See how each wires it, with its parts, size, README and files; the M28S’s symbol, footprint and pinout are on its own page.