Is 1FK2104-4AK01-1SB0 still in active production?
The Siemens 1FK2104-4AK01-1SB0 sits in the 1FK2 servomotor family built for the SINAMICS S120 drive platform and is listed as active in the manufacturer's record, so it remains a current-order part rather than a phase-out or EOL line. It is logged under product class C — produced to order, non-returnable against credit — which means every unit is built against a specific purchase order and the standard catalogue-return path does not apply.
What the headline ratings tell the controls integrator
The motor delivers M0 = 1.27 Nm of stall torque and PN = 0.6 kW at nN = 6000 rpm on a 380-480 V supply, with a second rating of PN = 0.4 kW at nN = 3000 rpm on a 200-240 V supply — the same frame covers both the European 400 V class and the North American 230 V class without a mechanical change. Feedback is an absolute encoder single-turn 22-bit (AS22DQC) read back through a DRIVE-CLiQ M17 plug, which means the drive performs commutation and safety-relevant position capture over the same cable — no external encoder cable, no separate battery box for the multiturn counter on this single-turn variant. The shaft is D19 x 40 mm with feather key, the power connector is size M17, and the housing carries IP65 protection — suitable for cabinet-adjacent machine mounting and washdown-tolerant zones where the motor face is exposed to coolant mist but not high-pressure jet.
Compliance pack on file
Export control is logged as AL:N / ECCN:N_CNDU, so the part does not trigger an export-licensing review on routine cross-border industrial shipments; this simplifies the documentary chain for project spares and replacement units shipped internationally.
Sourcing posture for 1FK2104-4AK01-1SB0
Group code R220 and product group 9021 are the internal Siemens classification keys — useful when matching the order against the manufacturer's price list and when cross-checking an invoice line against the original BOM position. Packaging is a single piece in a 452 x 250 x 267 mm box, so a small MRO shelf slot or project tote accepts one motor per carton without re-packing for typical service-spare handling. Because the part is built-to-order under product class C, the practical sourcing flow is to specify the full order code into the BOM and quote against the RFQ — pricing and lead time are confirmed at quote time rather than carried as a fixed shelf price.