What this module is — and what it isn't
The 3RW4746-0LC00 is a power semiconductor module, not a standalone soft starter. It's the internal switching stage for the 3RW4446 soft starter, and you need two of these modules per one 3RW4446 device. Rated 356 A at 690 V, this module handles the thyristor stack that ramps motor current during start. The 690 V rating means it's suited for 400 V and 690 V line supplies common in European and export panels.
Lifecycle stage is listed as 'current' — Siemens still produces this module.