What this contactor is and what it does
The Siemens SIRIUS 3RT1016-1AN02-1AA0 is a size S00 power contactor with a 24 VDC coil, rated to switch 10 A at 24 V and 3 A at 400 V in AC-3 duty. It mounts on a 35 mm DIN rail per DIN EN 50022, using either the integrated snap-on clip or screws. The 45 mm width and 72 mm depth fit standard panel layouts without crowding adjacent devices.
Key ratings and what they mean for your panel
The AC-4 rating at 400 V is 8.5 A — this is the current the contactor can interrupt during frequent plugging or inching operations. For motor starting (AC-3), the 400 V rating of 3 A governs the load it can handle cycle after cycle. The 690 V rating of 5.5 kW covers higher-voltage motor circuits common in European industrial panels. The screw terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²). For AWG, that's 2x (20 to 16), 2x (18 to 14), and 1x 12. The IP20 finger protection on the front and terminals means it's safe for open-panel mounting inside an enclosure. Operating temperature range is -25 to +60 °C, with a maximum altitude of 2 000 m. Pollution degree 3 suits the part for industrial environments with conductive dust or condensation.