2.4 Nm stall, 0.75 kW at 3000 rpm — what the headline numbers mean
The Siemens 1FK2204-5AF00-2SB0 is a SIMOTICS S-1FK2 CT synchronous servo from the 1FK2 family built for SINAMICS S120 drives, with a stall torque M0 of 2.4 Nm and a rated power PN of 0.75 kW at nN=3000 rpm on a 380-480 V supply, switching to PN=0.375 kW at nN=1500 rpm when the line drops to 200-240 V. That dual-rail rating matters on retrofit machines imported from a 480 V plant to a 240 V European feed — the motor still has a usable 0.375 kW point rather than falling off the curve. The shaft is a plain cylinder D14 x 30 mm and the housing carries IP64 protection — that is dust-tight and splash-resistant from any direction, fine for a control cabinet interior or a clean machine frame, but not a washdown-rated body for food-and-beverage conveyors. If the motor ends up on a wet end of line, step up to an IP65/IP67 variant in the same 1FK2 frame rather than sealing around this one.
DRIVE-CLiQ M17 + AS22DQC encoder — how it talks to the drive
Feedback is a 22-bit single-turn absolute encoder (AS22DQC) and the motor carries a DRIVE-CLiQ plug M17 — the digital encoder interface that auto-identifies the motor on the SINAMICS S120 and loads the electronic nameplate into the drive without manual parameter entry. For a commissioning tech that means no typing of pole count, resolver offset, or encoder resolution — the drive reads it on first power-up, and a swapped motor on a service call re-identifies the same way. The power connector is a size M17 plug on the motor side, matched to the SINAMICS S120 power cable family — the cable is ordered separately against the motor frame, and the pinout is keyed so the power and signal halves cannot be cross-mated. The DRIVE-CLiQ side uses a separate M17 signal connector so the encoder cable and power cable are physically distinct runs back to the drive.
Lifecycle, build-to-order class, and compliance paperwork
The 1FK2204-5AF00-2SB0 is listed as a current production part, and the product class is C — built to order, non-returnable, non-reusable — so stock at Siemens is not a thing; every order goes through the configured-to-order pipeline with a fresh serial. That is the standard posture for servo motors in this frame, and it explains why an MRO planner typically holds a spare on the shelf rather than relying on next-day factory shipment. Compliance footprint: RoHS conformity since 01-07-06 and REACH Art. 33 duty-to-inform on the current candidate list. Export control is AL:N / ECCN:N_CNDU — no licence required for the standard commercial destination. The carton ships at 452.00 x 250.00 x 267.00 mm, one piece per package, which is roughly the volume a bench tech should expect on receipt.