What this contactor is and what it does
The Siemens 3RT1015-1HB42-ZW97 is a Size S00 contactor from the SIRIUS family, rated AC-3 at 3 kW at 400 V for switching three-phase motor loads. The DC 24 V coil with a pickup range of 0.7 to 1.25 times rated control supply voltage gives it a defined pull-in margin — at nominal 24 V it pulls in reliably, and it drops out cleanly when the supply dips below the lower threshold. The single NC auxiliary contact is built in, so no separate aux block is needed for a basic safety or status feedback circuit.
Where it fits and how it connects
Size S00 means a compact 45 mm width on the DIN rail — it fits tightly in a crowded panel without wasting rail space. The screw terminals accept standard power and control wiring; strip length and torque spec follow the standard SIRIUS S00 pattern. The multi-unit packing (42 pieces, 2×1 layers) is a factory bulk configuration for OEMs or panel builders who burn through these in volume — each unit is individually functional, just packed for efficient kitting rather than single-box retail.