Solid State Relay, 25 A, 280 VAC, 3-32V, Panel Mount, Screw, DC Switch, Include: Siemens S: 20K/9403. Solid State Relay 25 A 280 VAC 3-32V Panel Mount Screw DC Switch Include: Siemens S: 20K/9403 240D25 Opto 22 is a reliable and cost-effective industrial automation component that can be purchased at PLC2Day. This item is commonly used in various industrial applications such as manufacturing, process control, and energy management.