Sourcing reality for this memory submodule
Because the part is mature, it's not in the phase-out pipeline. That said, it's a niche accessory — not a high-volume commodity — so stocking depth varies. The practical posture is quoted-to-order against an RFQ; we confirm availability and lead time per request. No substitute order code is listed by Siemens, so if your panel calls out 6AV3971-1NA02-0CA0, that's the one to specify.