Sizing the 1FK2 to the SINAMICS axis
The 1FK2104-5AF00-2SB0 sits in the SIMOTICS S-1FK2 HD line and is rated M0 = 2.4 Nm with PN = 0.75 kW at nN = 3000 rpm on a 380-480 V drive bus, with a derated point of PN = 0.375 kW at nN = 1500 rpm on 200-240 V — the two rating columns are the SINAMICS S120 operating envelopes, not a choice between two motors on the same bus. For the controls integrator the first decision is the feedback and connector stack: a single-turn 22-bit absolute encoder (AS22DQC) feeds back through a DRIVE-CLiQ plug M17, with power on the matching size M17 connector — both ends key to the same cable family, no separate resolver or encoder cable to land at the drive.
Mechanical envelope and what it connects to
The shaft is a plain cylindrical D14 x 30 mm stub, and the housing carries IP64 protection — a drip-and-splash rating suitable for cabinet interiors and machine enclosures, not a washdown or outdoor mount. Packaging ships at 452 x 250 x 267 mm on a single-piece quantity unit, consistent with a motor that travels in its own carton rather than multi-pack; expect that footprint on the receiving dock.
Lifecycle, compliance, and the order-handling class
Product class is recorded as C: manufactured or produced to order, items that cannot be reused, re-utilized, or returned against credit — that decision needs to land with the buyer before the PO is released, because standard stock returns do not apply. Substance compliance is documented: RoHS conformity since 01-07-06 and REACH Article 33 information made available through the manufacturer's Reach Information portal; export classification is AL:N / ECCN:N_CNDU.
Procurement context
Group code R220 and product group 9021 are the internal Siemens classification fields that flow through to the order acknowledgment and the packing documents; they don't change the BOM fit but they help the buyer's material master reconcile the line on receipt.