What this part is — and what it isn't
The 3RW4745-6SC44 is a control unit, not a standalone soft starter. It's the logic/trigger module that pairs with the 3RW4445 power frame to make a complete soft starter system. Rated for 230 V supply, it connects via screw terminals and handles the firing angle control, ramp timing, and protection logic for the main thyristor stack in the base unit. If you're sourcing this for a panel, verify the BOM already includes the matching 3RW4445 power section — this part alone won't start a motor.
Compliance and documentation
Part of the Siemens SIRIUS soft starter family, which carries CE and UL certifications for the product series.