Headline ratings and what they buy you
The Siemens 1FK2104-6AF11-1SA0 is a SIMOTICS S-1FK2 HD servo motor in the 1FK2 family, which pairs directly with the SINAMICS S210 drive — the encoder, brake, and connector are all sized for that drive platform, so substitution outside the S210 line requires re-engineering the feedback and power cable set. Continuous torque M0 = 3.2 Nm with PN = 1 kW at nN = 3000 rpm on the 380-480 V winding, and PN = 0.5 kW at nN = 1500 rpm on the 200-240 V winding — the lower-voltage figure is the holding torque and speed envelope when the cabinet is fed from a 230 V class supply, not a derating of the 400 V rating. An integrated holding brake ships with the motor, which is the feature that puts this part in the Servo Motors with Brake category — the brake handles the static shaft-locking duty after a controlled stop, not the dynamic braking of the moving load. The shaft is D19 x 40 mm with a feather key, the single-turn absolute encoder is the 22-bit AS22DQC, and the power/feedback interface is the rotatable M17 plug with OCC connector — a standard mechanical and electrical interface on this frame size, so any service swap uses the same coupling and cable gland.
Where it gets installed
IP65 on the motor body means the housing tolerates dust and low-pressure water jets — it can sit near the process on a packaging line, a small-format gantry, or a feeder/conveyor that gets washdown, but it is not a fully sealed submersible unit. Feather-key D19 x 40 mm shaft with a holding brake is the standard mount for a gearbox or pinion press-fit in the 3 Nm class — the brake eliminates the external brake resistor needed for gravity-loaded axes, which keeps the panel layout simpler on vertical-axis applications.
Lifecycle, compliance, and orderability
Product class is C — built to order, non-returnable, non-reusable against credit — so the order quantity must match the BOM line; any excess cannot be returned to the channel and must be absorbed into spares stock or scrapped. Group code R220 and product group 9021 are the Siemens administrative keys for the 1FK2 servomotor line — they are the fields the procurement system uses to route the PO through the drive-and-motor product group. Export classification AL:N / ECCN:N_CNDU means no export-licence paperwork applies for the standard commercial destinations; cross-border shipment does not require an export-control review on this part number.
Procurement reality for the BOM line
Packaging is 1 piece per carton at 452.00 x 250.00 x 267.00 mm — a single-unit shipper, so for a multi-axis machine the order line must list the carton count, not a master-pack quantity. Because the part is class C built-to-order and the lifecycle is active, the typical path is a project-quoted RFQ against the SINAMICS S210 BOM rather than a shelf-pull — the order enters the Siemens production schedule and the lead time is confirmed at quote.