What the part is and where it belongs
The Siemens 1FK7040-5AK71-1FG0 is a brushless servo motor from the 1FK7 compact series, positioned for use with SINAMICS S120 drive systems on precision motion axes.
Lifecycle: hot end-of-life sourcing reality
For a contract build carrying this part on the customer's approved-vendor list, that lifecycle read means any remaining BOM quantities should be locked in now while franchised distribution and independent surplus channels are still returning RFQs; a substitution outside the AML would require a written deviation, which the customer AVL may not accept.
How it lands on a SINAMICS axis
As a SINAMICS S120 servo motor, the 1FK7040-5AK71-1FG0 is paired with a S120 drive line via the DRIVE-CLiQ digital encoder interface — the motor connector carries the electronic nameplate and resolver/encoder data into the drive on first power-up, so commissioning order matters: drive first, then motor, with the topology auto-detected from the motor's stored rating plate.