What it is and where it fits
The Siemens 3RK1303-6ES81-3SA3-ZX95 is a control element in the ECOFAST R2SS family, fitted with PROFIBUS DVP1 interface. It is a fieldbus-connected component for distributed automation cells — think safety-rated I/O or actuator control on a PROFIBUS segment, typically inside a machine cabinet or on a gantry.
Sourcing and supply posture
Because the lifecycle stage is current, this part is sourced through standard Siemens distribution channels. It is quoted to order against an RFQ — no surplus or broker scavenging required. For a procurement buyer filling a BOM line, the key takeaway is that this order code is a live, factory-supported item.