SIRIUS S00 power contactor, 24 VDC coil
The Siemens 3RT1016-2AR61 is a SIRIUS S00 power contactor with a 24 VDC coil, rated for motor switching at 4 kW in AC-2 duty at 400 V and 8.5 A in AC-4 inching duty at 400 V. The main circuit uses spring-loaded terminals accepting 2x (0.25... 2.5 mm²) solid or stranded wire. It mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, with a 45 mm width that fits a standard 4-module slot.
What the ratings mean for fit
The AC-2 rating of 4 kW at 400 V covers slip-ring motor starting — the contactor makes and breaks full load current. The AC-4 rating of 8.5 A at 400 V covers plugging and inching duty where the contactor breaks locked-rotor current. The 24 VDC coil draws 10 A at 24 V rated value; verify the control transformer and fuse sizing. Spring-loaded terminals save panel wiring time compared to screw terminals — no torque driver needed, just strip to 8 mm and insert.
Panel integration
Snap-on mounting onto 35 mm DIN rail per EN 50022. Side-by-side mounting allowed with 6 mm spacing at the side for heat dissipation. IP20 on the front and at the terminals — suitable for enclosed panel use, not for washdown. Operating temperature range -25 to +60 °C. Pollution degree 3 environment.