What this control unit does in the soft starter system
The 3RW4726-1SC44 is a control unit — not a standalone soft starter — designed to pair with the 3RW4426 base unit. It supplies the logic and gate-drive signals at 230 V, with screw terminals for field wiring. This is the brain of the soft starter assembly; the power section (thyristors, bypass contactor) lives in the 3RW4426 frame. The control unit handles start/stop sequencing, ramp profiles, and motor protection parameters.
Lifecycle status and compliance baseline
RoHS compliance is confirmed per the substance prohibitance date of 07/01/2006. The part meets the EU RoHS directive effective from that date, covering lead, mercury, cadmium, and the other restricted substances.
Sourcing posture for this control unit
If the 3RW4726-1SC44 is the specified control unit for your 3RW4426 soft starter, the replacement path is the same order code.