What this card does in the drive cabinet
The 6SL3353-3AE41-4AR4 is a spare IPD (Interconnection Power Device) card for the SINAMICS S120 air-cooled Active Line Module fitted with an FPGA. It handles the gate-drive and feedback interface between the control unit and the power stage, rated for 380-480 V AC three-phase at 50/60 Hz and 1405 A — sized for the overload operating mode that delivers 200% reactive current when the line module needs to support regenerative braking or transient load demands. This card is the replaceable sub-assembly inside the Active Line Module; when the module's IPD board fails, swapping this spare restores the drive without replacing the entire line module. The 1405 A rating ties to the module's continuous current capability under the overload profile — not a short-time surge rating.
The product class is C — manufactured or produced to order, which means it is not a stocked catalogue item but is built against a confirmed order. This aligns with the spare-part nature: Siemens produces these IPD cards on a make-to-order basis for installed S120 cabinets. The 1-piece ordering unit and packaging quantity of 1 reflect that it is typically procured as a single replacement card, not in bulk.