What this module does
The Siemens 3RW4775-0LB00 is a power semiconductor module rated 356 A at 600 V, designed as a replacement or spare for the 3RW4075 soft starter series. It's the high-current switching element inside the soft starter — when the 3RW4075's internal module fails, this is the part that gets swapped. No need to replace the whole starter.
Lifecycle and compliance
RoHS compliance date is 05/01/2012, meaning it meets the EU Restriction of Hazardous Substances directive for lead and other restricted materials.