What this code is on a Siemens servo BOM
The 1FK7042-5AK71-1UA0 is a Siemens compact servo motor from the synchronous-servomotor family, used as the rotary axis drive in SIMOTICS S-class motion packages — its role on a panel is the motor half of a closed-loop positioning or speed section, with the drive-side electronics supplied by a SINAMICS-class inverter.
Lifecycle read on this part number
The listing carries lifecycle stage EOL hot, which means the manufacturer has flagged this code for phase-out and new-build orders against the official channel are no longer accepted — the field reality is last-time-buy residual stock, factory surplus, and independent distribution. For an MRO line-down or a panel builder with a closed BOM, an EOL-hot servo is still serviceable: the existing mechanical footprint, encoder interface, and connector pinout remain valid against any drive already configured for this code — what changes is the procurement channel, not the field replacement.