Lifecycle flag on the 1FK7
No official successor or cross-reference is named in the record. A board-level redesign is the only forward-compatible move if the 1FK7042-5AC71-1PA3 cannot be sourced; there is no drop-in second source on file from Siemens.
Sourcing posture
For a 1FK7042-5AC71-1PA3 order that needs to ship against a live BOM, the supply path is independent distribution with full manufacturer traceability — availability, current pricing, and lead time are confirmed against the RFQ. No price, stock count, or immediacy claim is asserted on-page; the answer to "is it obtainable, and how fast" lives in the quote response, not in the catalog line.