The Siemens 6SL3358-3AE37-4BA0 is a replacement IPD (Interface & Protection) card for the SINAMICS S120 liquid-cooled Basic Line Module rated 360 kW at 380–480 V three-phase, 50/60 Hz, pulling 740 A. This is the board that handles the gate-drive isolation, DC-link monitoring, and fault detection inside the module — not the power stack itself. If the module throws a comms fault or a DC-link imbalance and the power stage checks out, this card is the usual suspect. Group code R2SC and product group 4Q30 are Siemens internal classification tags — R2SC flags it as a drive-component spare, 4Q30 places it in the SINAMICS S120 liquid-cooled family. Useful for cross-referencing against older Siemens catalogues or when pulling a BOM from a plant archive.
RoHS compliant since July 2017, with a REACH Article 33 disclosure for lead (CAS 7439-92-1) above 0.1% w/w — typical for power electronics with solder joints or component terminations.
This card lives inside the liquid-cooled Basic Line Module — the rectifier unit that converts AC line to a regulated DC bus for SINAMICS S120 Motor Modules. You are not mounting it on a DIN rail; it bolts into the module chassis and connects via ribbon cables and screw terminals to the power stage and control interface. If you are rebuilding a 360 kW cabinet, this is the board that sits between the mains contactor and the IGBTs.