The Siemens 3RT1023-1AM80-0KR0-ZX95 is a SIRIUS 3RT1 power contactor in Size S0, rated AC-3 9 A and 4 kW at 400 V for switching three-phase motor loads. The coil is wound for 200-220 V AC, 50/60 Hz, and also covers 208-240 V, 60 Hz as a special-purpose variant. This is a phased-out product; the official successor is the SIRIUS 3RT2 series.
The lifecycle stage is listed as current, but the manufacturer's description flags this as a phased-out product with the successor being the SIRIUS 3RT2 series.
The AC-3 9 A rating at 400 V means this contactor is sized for switching standard squirrel-cage induction motors up to 4 kW under normal starting conditions — making- and breaking-current within the AC-3 utilization category.