ZDAuto STM Discovery & Nucleo I/O module 626454 - ZDAuto AIA05020B3, The ZDAuto AIA05020B3 I/O module features soldering pin connections and supports a maximum switching voltage of 30 V/DC and switching current of 30 mA. It operates on a supply voltage of 5 V/DC and processes both internal and external signals. This compact device, measuring 20 x 5 x 12.7 mm, is ideal for integrating into various electronic circuits for control and signal processing applications. ZDAuto AIA05020B3 M5S I/O Module, 5V/DC, 30V/30mA, Waterproof, Modular