The Siemens 6SL3353-3AG38-8CA0 is a spare-part IPD (Interface and Protection Device) card for the SINAMICS S120 air-cooled Smart Line Module. It sits inside the line module assembly, handling the control interface and protection logic between the drive controller and the active infeed section. This is not a standalone drive component — it is a field-replaceable PCB within the Smart Line Module chassis. If the IPD card fails on an S120 air-cooled Smart Line Module, this is the direct factory spare.
The part carries an active lifecycle status, so it remains in current Siemens production. However, the product class is C — manufactured or produced to order, which means it is not a stocked shelf item. Lead time and availability are confirmed at the time of RFQ, not before. No successor order code has been published; this remains the current spare part for the application.
