What this motor is and where it sits
The 1FK7040-5AK71-1KG3 is a Siemens 1FK7-series synchronous servo motor from the SINAMICS S120 family, listed under the Servo Motors category alongside the wider Motors & Motor Controls line. Built as a brushless servo with integrated feedback, it drops into the standard 1FK7 flange and shaft envelope on a SINAMICS S120 drive line, so an existing axis cabinet wiring harness and motor cable typically do not need a re-engineer when swapping like-for-like.
Lifecycle signal and the sourcing window
For a buyer with a SINAMICS S120 line that was specced against this exact frame, the practical sourcing path is independent distribution: quote against the BOM line at the required quantity, lead time confirmed at RFQ, and warranty/traceability paperwork aligned to the receiving site's quality pack.