Siemens 3RT6023-1AL20 — SIRIUS S0 Power Contactor, 230 VAC Coil
It carries a 230 VAC 50/60 Hz coil and is rated for AC-3 duty up to 690 V, delivering 23 kW at 400 V and 40 kW at 690 V (at 60 °C). The coil draws 0.25 A at 50 Hz and 0.28 A at 60 Hz, so the control transformer or PLC output must be sized for that inrush and hold current. The contactor is rated for 10 million mechanical operations typical, with a maximum switching rate of 1,000 cycles per hour under AC-3 or AC-3e duty. Side-by-side mounting is permitted, which saves rail space in dense panels.
The AC-3 motor-switching rating is the one that governs real motor loads: 23 kW at 400 V means this contactor handles a 3-phase induction motor of that size on a 400 V line. The AC-1 resistive rating would be higher, but for motor duty, the AC-3 figure is the binding constraint. The auxiliary contact block (integrated) is rated 6 A at 24 V, 10 A at 230 V, and 3 A at 400 V — enough for pilot duty on a PLC input or relay coil.