What this motor is on the BOM
The 1FK7042-5AF71-1EH5 is a Siemens SIMOTICS 1FK7 synchronous servo motor — a compact, high-dynamics brushless unit typically paired with a SINAMICS S120 drive on positioning axes, indexing tables, and small-format packaging or handling lines.
Lifecycle posture and what it means at the desk
Lifecycle stage is recorded as eol_hot — the part has been moved out of normal active distribution and into the late-cycle sourcing channel, so a standard factory-direct reorder is no longer the expected path. No official successor or second-source cross-reference is named in the record for this exact code, so a substitution has to be evaluated as a fresh engineering decision rather than as a drop-in.
Where the class sits in a panel
1FK7-series motors are designed to plug into a SINAMICS drive topology via the DRIVE-CLiQ feedback cable and to be commissioned through the drive's STARTER or Startdrive tool, which means the commissioning engineer's workflow is parameter download, motor ID run, and encoder check rather than manual tuning from scratch. Because this specific code sits in the late-cycle band, any spare stocked for a line-down event should be commissioned against the live drive's firmware version before being treated as a true like-for-like — different firmware builds can shift default parameter sets even on the same motor code.