What this contactor is and where it fits
The Siemens 3RT1036-1AP04-ZW96 is a 3-pole SIRIUS contactor rated for AC-3 duty at 22 kW / 400 V, with a 230 V AC 50 Hz coil. It carries 2 normally open and 2 normally closed auxiliary contacts, all in a size S2 frame with screw terminals. This is the part you spec into a motor branch circuit for a pump, fan, or conveyor — the AC-3 rating means it handles the inrush of a squirrel-cage induction motor during starting and breaks the load under running conditions. The size S2 footprint is a standard Siemens frame that fits the SIRIUS modular system, so it shares busbars, overload relays, and accessory kits across the 3RT1 family. The screw terminals accept up to the gauge typical for 22 kW motor feeds — no special crimp tool needed for field wiring.
Lifecycle and sourcing posture
For a BOM freeze or a line-down replacement, the 3RT1036-1AP04-ZW96 can be sourced to order against an RFQ. Availability and current pricing are confirmed at quote time through independent distribution.
What the AC-3 rating means for your motor load
The AC-3 utilization category is defined per IEC 60947-4-1 for starting and switching off squirrel-cage motors during running. At 22 kW / 400 V, this contactor is sized for a motor drawing roughly 40–45 A full-load current — a common rating for a 30 hp (22 kW) four-pole induction motor on a 400 V three-phase supply. The 230 V AC coil matches standard control voltages in European and many Asian panels; if your control circuit runs 24 V DC or 110 V AC, you need a different coil variant in the same frame.