The 3RA2110-0JA15-1FB4: It comes supplied with the 3RT2015-1FB41 contactor and 3RA1921-1DA00 link module, so you're not piecing together a starter from separate bins.
Mounting and panel fit
Vertical mounting position only, per the spec; clearance needs are 50 mm upwards, 20 mm forwards, and 20 mm at the side for air circulation and wiring access.
Where it lives in the panel
Rated for operation from -20 to +60 °C ambient, with storage and transport range from -50 to +80 °C. That covers most indoor industrial panels, but if your enclosure sits near a furnace or in a hot climate, keep an eye on the upper end — the bimetallic overload release is thermal, so ambient heat shifts the trip curve.
