The Siemens 3RA2140-4MD47-0AK6 is a combo motor starter from the 3RA2 series, integrating a contactor and overload relay in one unit for a 80-100 A motor load range. The description COMBO NR STR FB MTD S3 80-100A confirms it is a non-reversing, full-voltage, non-combination starter with a frame size S3, meaning it handles a 3-phase motor directly on-line without a separate disconnect in the same enclosure.
Ratings that drive the fit
For a motor load, that covers a 45–55 kW induction motor at 400 V (roughly 80–100 FLA depending on efficiency and power factor). The integrated overload relay provides Class 10 or Class 20 trip protection — which means it protects the motor from sustained overcurrent without nuisance-tripping on start-up inrush.