What this firing PCB does in the 3RW44
The 3RW4766-0VC70 is a firing printed circuit board rated for 460 V, designed for the Siemens 3RW44 soft starter family in sizes 5 and 6. It generates the gate-drive pulses that fire the thyristors in the power module — without this board the soft starter's ramp and current-limiting functions don't engage.
Lifecycle and compliance — active, RoHS dated
RoHS compliance is dated to 03/01/2017, confirming it meets the EU substance restrictions effective from that date.