The Siemens SIRIUS 3RA6120-1AB32 is a compact direct starter designed for continuous motor operation per IEC 60947-6-2. It integrates a contactor and overload relay into a single 45 mm wide unit that snaps onto standard DIN rail.
Recommended orientation is vertical on a horizontal rail, but the mounting position is listed as any, so horizontal rail in a shallow enclosure works too. The 45 x 170 x 165 mm footprint is compact enough for two-wide grouping in a 400 mm wide panel. Two LEDs on the front give local status indication — one for power, one for trip. No IO-Link or AS-Interface onboard, so this is a hardwired starter; the signaling stays local.