What it is and what the AC-3 rating means for your motor load
The Siemens 3RT1036-1AR60-ZW96 is a 3-pole contactor in the SIRIUS series, S2 frame size, with screw terminals and a 400 V AC coil rated for 50/60 Hz. Its headline rating is AC-3 duty at 22 kW on a 400 V supply — that is the motor-switching category per IEC 60947-4-1, meaning it handles starting currents (typically 6–8× FLA) for squirrel-cage induction motors driving pumps, fans, conveyors, and compressors. The 22 kW at 400 V figure is the one that decides fit for your BOM line; if your motor nameplate matches that power at that voltage, this contactor is sized correctly for the application.
Panel integration and packing
The S2 frame snaps onto DIN rail EN 60715 — standard panel integration for control cabinets. Screw terminals accept up to the rated conductor cross-section for the frame. This variant ships in multiunit packing of 15 units per pack, which suits a panel builder filling a BOM line in bulk rather than ordering singles.