The Siemens 6SL3357-3AG41-6AR8 is a spare Interface & Protection (IPD) card purpose-built for the water-cooled (CuNi) SINAMICS S120 Active Line Module rated at 1700 kW. It handles 1740 A continuous on a 750-1035 V DC link and carries an onboard FPGA that enables overload operation at 200% reactive current — meaning this card is the brains behind aggressive reactive power compensation when the line hits hard transients.
This card mounts inside the water-cooled Active Line Module cabinet — it's not a standalone board. The FPGA firmware is factory-loaded; no field programming is required. Verify the module's DC-link voltage range (750-1035 V DC) matches your installation before ordering.