2 layers38.1 × 38.1 mm

SIM868
vul-os/sirboard
Open hardware: 107 KiCad PCB designs — SMD-to-THT breakout adapters, ATTiny/ATMega/ESP development boards, and a 39-part sensor line on a common JST-SH connector.
73 parts56Apache-2.0
Boards in 1 GitHub repository, designed in KiCad, that use the BDFN1C031V by BORN (12pF 13V 200nA 3.3V 4V 70W@8/20us 9A@8/20us Bidirectional IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Single-channel TVS DFN0603-2 ESD and Surge Protection (TVS/ESD) ROHS). See how each wires it, with its parts, size, README and files; the BDFN1C031V’s symbol, footprint and pinout are on its own page.

vul-os/sirboard
Open hardware: 107 KiCad PCB designs — SMD-to-THT breakout adapters, ATTiny/ATMega/ESP development boards, and a 39-part sensor line on a common JST-SH connector.