The 3RA2110-1HD15-1AP0: It handles the inrush of a small three-phase motor (up to about 3 kW at 400 V) and breaks the load current on stop. Insulation rated 690 V, so it's comfortable on 400 V, 480 V, or 600 V line supplies without derating the voltage withstand. The operating range is -20 to +60 °C, which covers most ventilated panel environments; if your enclosure runs hotter, you'll need to derate per the Siemens SIRIUS application manual.
Busbar snap-on — panel integration in one move
Designed for 60 mm busbar systems: the starter snaps directly onto the busbar without a separate DIN-rail adapter. The supplied busbar adapter (8US1251-5DS10) is included in the assembly — you don't order it separately. Mounting position is vertical only; clearance around the unit is 50 mm above, 20 mm front, 10 mm below, 20 mm on each side, with zero rear clearance needed. At 45 mm wide, it fits standard S00 feeder compartments.
What's in the box — pre-assembled, not a kit
This is a direct-on-line starter delivered as a single order code: it includes the 3RT2015-1AP01 contactor, the thermal bimetallic overload relay, the link module (3RA1921-1DA00) that connects them electrically, and the busbar adapter. No separate wiring between contactor and overload — the link module does that.