The Siemens 3RT7016-1AF02 is a Size S00 contactor in the SIRIUS family, with three main poles and three normally-open main contacts. The 45 mm width and 72 mm depth mean it fits a typical 45 mm-wide DIN cell — plan your rail fill accordingly.
Rated operational current at 230 V is 6 A, at 400 V it's 3 A, and at 690 V it drops to 1 A. The maximum AC-3 and AC-3e rated voltage is 690 V, so this contactor handles motor switching up to that voltage in standard AC-3 duty. Insulation voltage is rated 690 V, surge voltage resistance is 6 kV — that covers the impulse withstand for most 400 V industrial panels. The DC coil draws 0.8 W to close and 0.27 W to hold — low enough for direct PLC output drive in many cases, but verify the output's current capability against the inrush.
Side-by-side mounting is allowed, so no derating for adjacent units in the same row.