2 layers49 × 49 mm

Boards in 1 GitHub repository, designed in KiCad, that use the 4N25M by onsemi (-40℃~+125℃ 1 1.18V 20% 270mW 30V 4.17kV 500mV@2mA,50mA 60mA 6V DC Phototransistor DIP-6 Transistor, Photovoltaic Output Optoisolators ROHS). See how each wires it, with its parts, size, README and files; the 4N25M’s symbol, footprint and pinout are on its own page.