What this motor is and where it drops in
The Siemens 1FK2104-6AF01-0SA0 is a SIMOTICS S-1FK2 HD synchronous servo motor from the 1FK2 family, the motor line paired with the SINAMICS S210 drive platform (cite:). Rated M0=3.2 Nm continuous stall torque, with PN=1 kW at nN=3000 rpm on a 380-480 V link and PN=0.5 kW at nN=1500 rpm on a 200-240 V link (cite:), so a single BOM line covers both 230 V and 400 V class cabinets without a separate low-voltage variant. The shaft is cylindrical D19x40mm, the feedback is an absolute single-turn 22-bit encoder (AS22DQC) with an OCC interface, and the connector is the rotatable M17 plug (cite:) — the rotatable plug is the small detail that lets the panel builder orient the cable exit after the drive cabinet is already laid out, without re-clamping the motor.
Fit, ratings, and what they actually constrain
IP65 protection on the motor body means the unit tolerates dust ingress and low-pressure water jets, suitable for typical factory-floor cabinets and machine enclosures but not high-pressure washdown (cite:). At 3.2 Nm continuous stall and 1 kW rated on the 400 V link, the motor sits in the small-format S-1FK2 HD bracket — a match for light to mid-duty positioning axes, small-format conveyors, indexing tables, and packaging or lab automation axes where a 22-bit absolute encoder gives the controller one-revolution absolute position on power-up without a homing move. The absolute encoder is single-turn, not multi-turn — battery-backed or gear-referenced multi-turn retention is not built in, so vertical-axis applications that need absolute position across power-cycles require the controller to re-home from a limit switch after each power-up (cite:). The product class is C — built to order, not reusable and not returnable for credit (cite:), which is the kind of line-item that needs to clear purchasing policy before the requisition goes through.
Lifecycle and compliance status
Export control classification is AL:N / ECCN:N_CNDU (cite:), which means no special export license paperwork applies for the typical cross-border shipment; RoHS and REACH declarations are the compliance pack that travels with the unit (cite:,cite:).
Catalog identifiers for the indirect-spend desk
Group Code R220 and Product Group 9021 (cite:,cite:) are the internal Siemens product-classification keys the procurement system uses to route the line to the correct catalog punch-out and contract pricing band. Quantity unit is 1 piece (cite:) and the packaging is a single-unit shipper at 452.00 x 250.00 x 267.00 mm (cite:), the kind of packaging that should clear a standard cabinet-incoming goods shelf without a separate oversize-handling tag.