Drop-in on an existing SINAMICS S120 line
The Siemens 1FK2104-5AF00-1SB0 is a SIMOTICS S-1FK2 HD servo motor in the 1FK2 family, sized for SINAMICS S120 drive commissioning. Holding torque M0 = 2.4 Nm, with PN = 0.75 kW at nN = 3000 rpm on a 380–480 V supply and PN = 0.375 kW at nN = 1500 rpm on 200–240 V — the same frame runs two plant busses without a re-spec. It carries an absolute encoder single-turn 22-bit (AS22DQC) and terminates through a DRIVE-CLiQ plug M17 for the feedback path and a power connector size M17 for the motor leads — no separate resolver cable, no third-party encoder retrofit.
Mechanical envelope and shaft
The shaft is D19 × 40 mm with a feather key, so a direct-coupled gearbox or pinion drops onto the same envelope as the prior 1FK2 frame in this rating class. The 1FK2 family is the modern compact servo line for SINAMICS S120, so a retrofit into a cabinet that already runs S120 modules is a cable-and-parameter job rather than a re-engineering task. Packaging dimensions 452.00 × 250.00 × 267.00 mm reflect the single-piece shipper; the motor itself sits well inside that box and the gross figure only matters for incoming inspection and rack sizing at the loading dock.
Sealing, ambient, and what IP64 actually covers
Degree of protection IP64 means the motor body is dust-tight and resists splashing water from any direction — that covers typical cabinet-internal and sheltered machine-base duty, but not hose-down or food-and-beverage washdown where IP65 or higher is the floor.
Lifecycle and sourcing posture
Lifecycle stage is current and the part is listed as active — there is no EOL or last-time-buy signal on the record, so the BOM position can be specified forward without an LTB cutoff calendar. The product class flag is build-to-order, not stock-and-resell; lead time depends on the Siemens production slot at the time of RFQ, and confirmation happens against the quote, not the listing. Internal purchasing fields — Group Code R220 and Product Group 9021 — are the ERP keys a procurement team will want quoted back on the PO line so the part clears their material master cleanly. The order unit is 1 piece with a packaging quantity of 1, so single-unit spares for line-down MRO are orderable in the same channel as a multi-unit build.