What the catalog line tells the integrator
The Siemens 1FK2104-4AK10-1SB0 is a SIMOTICS S-1FK2 HD synchronous servo motor with a stall torque of 1.27 Nm and a rated output of 0.6 kW at 6000 rpm when fed from a 380-480 V SINAMICS drive, or 0.4 kW at 3000 rpm from a 200-240 V drive. It ships with an integral holding brake, IP64 sealing, a D19x40 mm keyed shaft, a single-turn 22-bit absolute encoder (AS22DQC), and a DRIVE-CLiQ feedback plug plus M17 power connector — the standard pairing for a SINAMICS S120 booksize or blocksize axis on the machine side. Catalog metadata flags the part as Group Code R220, Product Group 9021, packaging quantity 1 Piece, and product class C — the class meaning the unit is built to order and not returnable. That classification is the procurement reality behind the listing: every motor is wound, encoder-aligned and brake-set against a fresh works order, so the lead-time clock starts on the RFQ, not the shelf. Lifecycle reads as Active per the catalog stage.
Reading the nameplate string for fit
The dual-voltage power rating (0.6 kW at 6000 rpm on 380-480 V versus 0.4 kW at 3000 rpm on 200-240 V) tells the panel designer which SINAMICS line to pair it with: the higher figure goes with a 400 V-class drive on a three-phase industrial bus, the lower with a 230 V-class drive in a lighter machine or North-American 240 V coil. Sizing the drive to the lower of the two ratings would under-utilize the motor at the higher bus voltage; sizing to the higher figure would exceed the motor's continuous thermal envelope on a 230 V-only axis. The 22-bit single-turn absolute encoder (AS22DQC) gives 4,194,304 counts per revolution — fine enough for high-dynamic positioning without battery backup, which suits rotary axes where an absolute reference is established only at commissioning. The DRIVE-CLiQ plug means the motor auto-identifies on the SINAMICS drive: electronic nameplate, encoder parameters and brake logic load automatically, no manual parameter entry.
Compliance trail the buyer will be asked for
REACH Article 33 information is published for the current candidate-list substances; the dossier is the document to attach when the OEM's compliance pack is requested. That keeps the cross-border paperwork short for an integrator shipping machines into North America, the EU and most of Asia-Pacific.
How it lands against the typical SINAMICS pairing
The three peer order codes in the catalog all sit in Product Group 9775 (Air-cooled Power Modules in blocksize format) with packaging footprint 495 x 356 x 300 mm — these are the SINAMICS S120 booksize / blocksize drive modules the 1FK2104-4AK10-1SB0 typically drives, not motor alternatives. A panel specified around any of those drives pairs to this motor through the DRIVE-CLiQ cable and M17 power lead, not as a drop-in replacement.