The Siemens 3RW3047-1BB04 is a SIRIUS soft starter in the S3 frame size, designed to ramp induction motors up to speed and reduce inrush current during start. It's built around thyristors for the power stage, so no mechanical contacts wear out on starts. This unit is rated for a continuous motor current of 106 A at 40 °C, derating to 98 A at 50 °C and 90 A at 60 °C — the 40 °C figure is the one to spec by unless your panel runs hot. Control is 24 V AC at either 50 or 60 Hz, common for standard PLC output cards.
It accepts vertical mounting with ±10° rotation or tilt, so panel layout is flexible. Clearance specs: 60 mm above, 40 mm below, 30 mm at the sides. Main circuit connections are screw-type terminals, accepting 2x (10–70 mm²) stranded or 2x (10–50 mm²) finely stranded copper. Solid wire is 2x (0.5–2.5 mm²). The AWG equivalents for the main terminals are 2x (7–1/0) using both clamping points, or 10–2/0 using either the front or back clamping point alone. Insulation voltage is rated 600 V. Pollution degree 3 per IEC 60947-4-2, so it's fine in standard industrial panels.
What it doesn't have (so you don't get caught)
A few things to note that aren't on this variant: no external reset, no inside-delta circuit, no motor overload protection built in, no intrinsic device protection, and no adjustable current limitation. Minimum load is 10% of the rated current. Maximum motor cable length is 300 m. These aren't flaws — they define the feature set, so if your application needs any of those, this isn't the variant.