This Harmony SSL socket for solid state slim interfacing relay has spring terminals and a rated voltage of 5V DC." "It also offers clear circuit labelling on the sides to facilitate installation and maintenance." "It features a visual indicator LED for a simpler troubleshooting and commissioning." "Its clear schematic on the side of the socket enables easier wiring and maintenance." 0 0 0 0 0 0 0 0 0 0 0 0