The Siemens 3RT6026-1AK60 is a SIRIUS S0-frame power contactor rated for 23 kW at 400 V at 60 °C ambient — the figure that decides the motor load it can handle in a typical European 400 V three-phase panel. Insulation voltage is 690 V, so it sits comfortably in 400 V and 690 V distribution without derating the isolation gap. Mechanical life is 10 million cycles typical, meaning it outlasts most of the panel it's bolted into. The S0 frame is 45 mm wide. Side-by-side mounting is allowed. Screw-type terminals accept 2x 0.5–1.5 mm² or 2x 0.75–2.5 mm² solid or stranded. Coil draw at 24 V is 6 A inrush — check your PLC output or interposing relay can handle that peak before committing the BOM line. At 230 V the inrush drops to 10 A. The coil is AC-operated; rated coil voltages are 110 V at 50 Hz and 120 V at 60 Hz.
Maximum switching rate for AC-3 motor duty is 750 operations per hour; AC-4 (plugging/inching) is 250 per hour. The mechanical switching rate is 5 000 per hour — that's the limit of the spring-and-magnet, not the contacts. For resistive loads (AC-1) you get 1 000 per hour. The AC-3e rating tracks the AC-3 maximum at 750 per hour. If your application cycles a conveyor motor more than once every 5 seconds, you'll exceed the AC-3 rate and need to step up to a larger frame or a dedicated switching device.
Integration — DIN rail, mounting position flexibility
That covers most panel layouts — horizontal rail, vertical rail, or angled sub-panel. Minimum conductor size is 10 mm² at both 40 °C and 60 °C ambient — that's the lug capacity, not the wire rating.