The 6SL3357-3AG35-8AA0 is a replacement Interface and Protection (IPD) card for the SINAMICS S120 liquid-cooled Active Line Module rated at 630 kW. It is designed for 500-690 V 3-phase AC input at 50/60 Hz, handling 575 A. This is a spare part — the card sits between the line filter and the power section, managing pre-charge, line contactor control, and fault monitoring for the regenerative Active Line Module.
Siemens lists this IPD card as Active in production. It is classified as Product class C — manufactured/produced to order, not a standard stocked item. That means each unit is built against a confirmed order; it cannot be reused or returned once assigned to a specific project.