Control unit for 3RW4447 — 230 V screw-terminal variant
The Siemens 3RW4747-6SC44 is a control unit designed for the 3RW4447 soft starter series, operating at 230 V with screw-terminal connections.
What the control unit does in the soft starter system
This is the logic and power supply section that governs the soft starter's firing angle, ramp time, and protection parameters — it is not the main power module, so a replacement requires matching the control unit to the existing 3RW4447 power section. The screw terminals simplify field wiring for the control supply and signal connections, which is relevant for panel builders who need to land the control loop without crimping ferrules.
Compliance documentation and substance restrictions
The substance prohibition date is listed as 05/01/2012, which aligns with the EU RoHS compliance scope for this production batch — the control unit meets the restricted-substance thresholds effective from that date.