SIRIUS S00 power contactor, 3-pole, 4 kW at 400 V
The Siemens SIRIUS 3RT1016-1AR11 is a size S00 power contactor rated for 4 kW at 400 V in AC-3 duty, meaning it switches three-phase squirrel-cage motors up to that load. The 24 VDC coil is standard for PLC-driven panels. Three normally-open main contacts handle the power circuit; there are no auxiliary contacts built into this base unit. Mounting is screw or snap-on onto 35 mm DIN rail per EN 50022, which fits standard panel layouts. The 45 mm width and 57.5 mm height keep the footprint compact for dense control cabinets.
Ratings and what they mean for fit
The AC-3 motor rating of 4 kW at 400 V is the headline figure for this contactor — it governs the majority of induction motor switching applications. For more demanding duty cycles, the AC-4 rating of 8.5 A at 400 V applies, covering plugging and inching operations where the contactor makes and breaks stalled rotor current. Short-circuit coordination is specified: Type 2 coordination requires a 20 A gL/gG fuse, while Type 1 coordination allows a 35 A gL/gG fuse. This matters for selectivity studies and panel SCCR calculations — the fuse size directly affects the let-through energy the contactor must survive. The screw-type terminals accept 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) solid, or up to 2x (0.75 to 4 mm²) solid — covering the common control and power wiring sizes for a 4 kW motor circuit. AWG equivalents are 2x (20 to 16), 2x (18 to 14), and 1x 12. Mechanical life is rated at 30 million operations typical, which is appropriate for high-cycle applications like conveyor systems or packaging lines where the contactor cycles frequently. Front IP20 protection means the contactor is safe from finger contact when mounted in an enclosure — standard for control panels. Operating temperature range of -25 to +60 °C covers most industrial environments without derating.