The Siemens 3RF3320-1AA06 is a 1-pole solid-state contactor from the SIRIUS 3RF33 family, rated AC-1 / 20 A at 40 °C with a 48-600 V operating voltage and a 24 V DC coil.
Where it fits in a panel
The 3RF3320-1AA06 uses screw terminals and mounts on a DIN rail — standard for European-style control cabinets. The packaging footprint is 105 x 27 x 122 mm, so it occupies a single 27 mm-wide module slot. That's another SKU that fits a standard bin without surprises. For a wireman, the 24 V DC coil means no separate control transformer for the logic side; just pull 24 V from the PLC output card or a dedicated power supply.