2 layers100 × 45 mm

Boards in 2 GitHub repositories, designed in KiCad, that use the BC817K-40 by DIOTEC (1 NPN 100nA 170MHz 250 45V 500mA 500mW 5V 700mV NPN SOT-23-3(TO-236-3) Bipolar (BJT) ROHS). See how each wires it, with its parts, size, README and files; the BC817K-40’s symbol, footprint and pinout are on its own page.