ADF04ST04 is a mechanical DIP switch designed for surface mount PCB applications. It features a single pole single throw (SPST) configuration with a flush slide actuator style, making it suitable for compact electronic designs. The switch is part of the ADF-SMT series from TE Connectivity and is RoHS/ELV compliant. Common applications include configuration settings, mode selection, and user interface controls in electronic devices where reliable mechanical switching is required.