The Omron K3HB-SSD-CPAC22 AC100-240 is a panel-mount temperature and process controller from the K3HB series, running on a 100-240 VAC supply. It sits in the Control Devices category, subclass Temperature & Process Controllers, so it's the component you'd find on a DIN-rail or panel cutout handling PID loop or limit control for a heater, oven, or process bath.
The 100-240 VAC input means this controller takes standard line voltage directly — no separate 24 VDC power supply needed for the control circuit. That simplifies panel wiring if you already have 120 V or 230 V available, but it also means the internal power supply is sized for that range; verify your line voltage is within that band before committing the BOM line.