End-of-life phase-out on the 1FK7 compact servomotor
The 1FK7042-5AF71-1KG0: The 1FK7 compact series mates with SINAMICS S120 and SINAMICS V90 drive platforms over the DRIVE-CLiQ or encoder feedback path that defines the S-1FK7 line, so sourcing decisions on this part are tied to whether the existing cabinet already runs the matching Siemens drive electronics.
Replacement decisions and cross-reference for installed base
Because the part is in EOL/HOT, buyers sourcing for an installed SINAMICS line should treat 1FK7042-5AF71-1KG0 as a maintenance spare rather than a new-machine fit: the official replacement path runs through the next-generation SIMOTICS S-1FK2 compact family for new builds, while the 1FK7042 variant itself remains the right call only where an existing SINAMICS S120/V90 drive is being kept in service.
How the line is sourced while production winds down
For an EOL/HOT servo motor the procurement question is not "where in stock" but "how many are still traceable" — Siemens-allotted inventory runs down against last-time-buy deadlines, and the rest of the field-failure supply comes through independent surplus channels with lot-specific traceability confirmed at RFQ. Send the BOM quantity and the SINAMICS drive firmware revision with the request so the quote reflects the encoder variant that is actually still on the shelf.