What this spare part does
The Siemens 6SL3358-3AE41-2BA0 is a replacement IPD (Interface and Protection) card for the liquid-cooled SINAMICS S120 Basic Line Module rated at 600 kW, 380-480 V three-phase AC, 50/60 Hz, and 1220 A. This is the board that handles the module's internal communication, protection logic, and interface to the drive control unit — not a power section, but the card that keeps the power stage talking to the rest of the system. When this card fails, the module drops its ready state and the line stops.
