Where this motor drops into a SINAMICS S120 line
The Siemens 1FK2104-5AF10-1SB0 is a SIMOTICS S-1FK2 HD servo motor in the 1FK2 family, sized for SINAMICS S120 drive commissioning with DRIVE-CLiQ feedback (cites:,). Rated torque is M0=2.4 Nm with PN = 0.75 kW at nN=3000 rpm on a 380-480 V bus and PN = 0.375 kW at nN=1500 rpm on a 200-240 V bus, which means the same frame covers both the 230 V and 400 V SINAMICS line-ups without rewiring the cabinet (cites:). The motor carries an integrated holding brake, IP64 sealing, a D19x40 mm feather-key shaft, and a 22-bit single-turn absolute encoder (AS22DQC) — the configuration a packaging or small-format machine builder typically specifies when a fail-safe hold position is required at power removal (cites:).
Lifecycle and build-to-order class
Lifecycle stage reads as current, so this order code is still a live Siemens configuration rather than a phased-out variant (cites:,). Product class is C: built to order, non-returnable and not re-usable as a stock unit, which is the procurement signal that the lead-time clock starts at order entry rather than at shelf-pull (cites:). Packaging is one piece per shipper at 452 x 250 x 267 mm, and the export-control tag AL:N / ECCN:N_CNDU means no special export licence gate on cross-border dispatch (cites:,).
Sourcing posture for a critical spare
Build-to-order product class plus a 3000 rpm / 0.75 kW rating means the practical move is to keep one in the cabinet against a SINAMICS S120 line-down rather than chase the lead time after the failure (cites:,). Specified into the BOM at quote time, with availability and current pricing confirmed against the RFQ through independent distribution — no shelf-stock promise attached (cites:).