The Siemens 3RT1016-2AN21-1AA0 is a SIRIUS power contactor in the Size S00 frame — the smallest in the SIRIUS family, built for switching motor loads up to 5.5 kW at 690 V in AC-3 duty. Spring-loaded terminals on the main circuit accept 2x (0.25 to 2.5 mm²) solid or stranded wire, which saves a screwdriver turn on the line but needs a proper ferrule for stranded below 0.5 mm².
Auxiliary contact ratings: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 0.3 A at 220 V DC — the DC curve drops fast, so verify your inductive DC load against the 220 V / 0.3 A line.
The IP20 finger-safe front terminals mean the panel builder can leave the gland plate open during commissioning without shock risk, but the contactor itself is not washdown-rated.
