What you're actually mounting
The Siemens 1FK2104-5AF11-1SB0 is a SIMOTICS S-1FK2 HD servo motor with 2.4 Nm static torque M0, 0.75 kW rated power PN at 3000 rpm on a 380-480 V bus, and a holding brake — sized as the mid-frame workhorse of the 1FK2 high-dynamic family, paired with SINAMICS S120 drives via the DRIVE-CLiQ M17 feedback plug and a size M17 power connector. The shaft is D19 x 40 mm with a feather key, the absolute encoder is a single-turn 22-bit AS22DQC, and the housing carries IP65 protection — meaning the motor tolerates dust ingress and low-pressure water jets, so it can sit on a machine skid near coolant splash without an additional shroud, but it is not sealed for full washdown immersion.
Two speed points, one motor
Siemens rates this motor at 0.75 kW PN at nN = 3000 rpm on a 380-480 V drive bus, and again at 0.375 kW PN at nN = 1500 rpm on a 200-240 V bus — so the same frame number is used in both 400 V-class European panels and 230 V-class North American builds without a re-spec, which matters when the BOM line is shared across regions. The holding brake keeps the axis parked when the drive is de-energised; the DRIVE-CLiQ M17 plug carries the encoder and electronic nameplate to the SINAMICS S120 line, so commissioning swaps the motor against the connected drive's automatic parameter read rather than a manual entry.
Bookkeeping and compliance trail
Siemens classifies this under Group Code R220 and Product Group 9021, ships it as a single-piece unit (quantity unit 1 Piece, packaging 452.00 x 250.00 x 267.00 mm), and lists Product class C — meaning it is built to order and cannot be returned against credit once the order is in production. Compliance: the motor has been RoHS-conformant since 01-07-06, falls under REACH Art. 33 information duty (current SVHC list applies), and is not export-controlled — AL: N / ECCN: N_CNDU — so cross-border shipments do not require a licence declaration for this code.