1FK7083-5AC71-1TH3-Z — a SIMOTICS S-class synchronous servo in the 1FK7 frame
The 1FK7083-5AC71-1TH3-Z is a Siemens SIMOTICS S-class synchronous servo motor in the compact 1FK7 high-dynamic family, listed under the Servo Motors category. It carries the customary -Z option-code suffix that Siemens uses to bundle shaft, brake, encoder and connector variants behind a single order code, which is the main reason two visually identical nameplates can differ in terminal box, holding brake, or feedback type.
EOL-hot flag — what the lifecycle status actually means here
The lifecycle entry is eol_hot, Siemens' shorthand for a motor that is being run out of production with limited or no replacement stock coming from the factory. For the buyer this reads as: new-built units are no longer entering normal distribution in steady volume, and any pipeline replenishment now travels through surplus, broker, or last-time-buy channels rather than the standard Siemens catalog. Where Siemens has superseded an 1FK7 to a newer SIMOTICS S-1FK2 or S-1FK7 generation, the replacement is usually a frame-and-stack mapping exercise rather than a drop-in: the shaft diameter, encoder protocol, and connector pinout are not guaranteed to match, so a board-side swap almost always means a wiring and commissioning review even when the mechanical envelope looks the same.