The 3RT2024-1AL20-Z W97 is a size S0 power contactor from the Siemens SIRIUS family, rated AC-3e/AC-3 at 12 A and 5.5 kW at 400 V for switching three-phase motor loads. The 1 NO + 1 NC auxiliary contact block is integrated, covering basic feedback and interlock wiring without an add-on module. Screw terminals on the S0 frame accept standard power and control wiring; the packaging dimensions of 90 x 45 x 100 mm give the panel space required per unit when laying out a multi-contactor group on DIN rail.
Panel integration
For a multi-contactor motor control center, allow the 45 mm width per unit plus side-by-side spacing for wiring clearance. The 230 VAC coil draws its rated inrush and hold current from the control circuit — verify the control transformer VA budget if grouping several contactors on one circuit.