What this 3RT1015-1AK62-ZW97 is for
This is a Siemens SIRIUS Size S00 contactor, rated AC-3 for motor switching at 3 kW on a 400 V three-phase line. The AC-3 rating means it handles the inrush of a squirrel-cage induction motor during starting and breaks the running current — so it's sized for a small pump, fan, or conveyor drive, not just resistive heater loads. The 1 NC auxiliary contact gives you one normally-closed feedback path for a run-status signal or safety interlock without adding a side-mount block. Coil is wound for 110 V at 50 Hz and 120 V at 60 Hz — a dual-frequency coil that's common in export panels where line voltage shifts with frequency. At 50 Hz the coil impedance is lower, so the holding power stays consistent across both frequencies.
Size S00 frame with screw terminals — fits the standard DIN-rail footprint for this class. The screw terminals accept up to 4 mm² stranded or 6 mm² solid, so it handles the motor branch circuit wiring without needing a separate terminal block for the power path. Multi-unit packing (42 pieces per layer, 2 layers) means this is the bulk-box variant — same contactor as the single-pack 3RT1015-1AK62, just bundled for OEM panel builders who burn through dozens per shift. The ZW97 suffix flags the multi-unit packing. If you're ordering for a one-off repair, the single-pack version (3RT1015-1AK62) is the same electrical part — the ZW97 just changes how it ships. For a line-down MRO situation, grab whichever variant is on the van; they're identical inside.