What the 1FK2104-5AK10-0SB0 is, and where it sits
The 1FK2104-5AK10-0SB0 is a SIMOTICS S-1FK2 HD servo motor in the 1FK2 servomotors family, built to couple directly with a SINAMICS S120 drive through the DRIVE-CLiQ M17 plug on a M17 power connector. It carries a holding brake and an absolute single-turn 22-bit encoder (AS22DQC) so the drive reads position the moment the link comes up — no homing move on every cold start. The cylindrical shaft is D19 x 40 mm and the housing carries IP64 protection.
Rating fit for a packaging-line or indexed-motion axis
A 2.4 Nm M0 with a 6000 rpm rated speed puts this frame in the sweet spot for small indexing axes, label heads, volumetric fillers, and high-cycle rotary cutters — the holding brake is sized for the same inertia class so the axis holds position after the drive is inhibited, which matters on vertical or overhung loads where back-driving is unacceptable.
Compliance and declaration pack
Compliance on the part is recorded as RoHS-conformant since 01-07-06 and REACH Art. 33 duty to inform per the current candidate list — meaning the declaration packet arrives with the shipment and ships with the Reach Information sheet, which is what most customs desks and incoming-inspection routines pull first. Lifecycle is active on the manufacturer record, and the order code carries Group Code R220 / Product Group 9021 — useful for matching against Siemens configurator outputs and ensuring the BOM line is keyed to the current product group, not a predecessor series.
Commercial posture and how it is ordered
Plan the BOM line accordingly: small lot sizes are accepted, but replenishment follows a build cycle, not a shelf.