Part identity and deployment
The Siemens 6SL3353-3AE41-0AA4 is a replacement IPD (Intelligent Power Device) card for the SINAMICS S120 air-cooled Active Line Module, carrying an FPGA for the control interface. It's rated for 380-480 V three-phase AC at 50/60 Hz, with a continuous current capacity of 985 A — sized for the highest-current frames in the S120 ALM lineup. This card lives inside the Active Line Module chassis, not on a DIN rail; integration means opening the module, swapping the board, and re-torquing the busbar connections. The 985 A rating governs the regenerative supply stage, so it's the board you'd replace when the FPGA or the IPD's gate-drive section fails on a high-power line-side converter.