1FK7 compact servo, EOL/hot on the line
The Siemens 1FK7042-2AF71-1EB0 is a 1FK7 compact synchronous servo motor in the SIMOTICS S family, sized for high-dynamic positioning on machine axes where short rotor length and high torque density are required. The lifecycle flag on this part is eol_hot, which means the OEM has flagged it for phase-out while still shipping last-time-buy volume; replacement stock at the factory is finite and the channel is moving to independent surplus.
Sourcing posture for a hot EOL servo
An eol_hot reading means procurement should treat each RFQ as a single-event buy: confirm the lot, confirm the date code, and lock the quantity in one pass before the remaining factory channel thins out. Independent surplus is the realistic fill once factory stock clears — Siemens 1FK7042-2AF71-1EB0 turns up in plant-closure pulls and integrator de-stocks, which is exactly the lane to walk for a line-down spare or a BOM freeze on a machine still in service. Pin-compatible alternates within the 1FK7 family are close but not identical — winding code, brake option, encoder type and shaft detail all change the order code, so any cross-reference has to match the full -1EB0 suffix, not just the frame.
Ordering notes for the BOM line
For a like-for-like replacement on an existing SINAMICS S120 drive line, the encoder and brake options encoded in the -1EB0 suffix have to match what the drive is commissioning — a mismatch here is the most common reason a same-frame swap faults on first power-up. Quoted against the RFQ rather than held as a stocked line, because an eol_hot motor's availability is lot-specific and tied to whatever factory pull or integrator de-stock surfaces that week.