The 6SL3357-3AG35-8AA8 is a SINAMICS S120 replacement IPD card specifically for water-cooled (CuNi) Active Line Modules rated at 630 kW, 500-690V 3AC, 575 A, and includes an FPGA. This is the board that handles the interface and control logic between the drive controller and the water-cooled line module — if this card fails, the module won't communicate or regulate DC-link voltage properly.
Fit and deployment context
This is a field-replaceable spare part, not a standalone drive. It mounts inside the water-cooled Active Line Module enclosure and connects to the module's backplane and the drive controller via the internal DRIVE-CLiQ interface. If you're swapping this in the field, you'll need access to the module's interior — the card is typically behind a cover plate on the module chassis. No shop, no crane: it's a board-level swap you can do on site with the module still in the cabinet, as long as you follow the standard S120 safe discharge time (5 minutes after removing mains power).