What this motor actually does in a cabinet
The Siemens 1FK2104-5AF01-1MB0 is a SIMOTICS S-1FK2 HD synchronous servo motor — held-stall torque M0 of 2.4 Nm with a rated power of 0.75 kW at 3000 rpm on a 380–480 V bus, and 0.375 kW at 1500 rpm on 200–240 V — packaged in a sealed IP65 housing with a keyed D19 x 40 mm shaft and 22-bit + 12-bit multiturn absolute encoder wired through a DRIVE-CLiQ M17 hybrid plug. In plain terms: a 0.75 kW servo that drops onto a SINAMICS drive via DRIVE-CLiQ, so the drive auto-reads the motor's nameplate and encoder resolution on first power-up — no manual parameter entry for the motor side, only for the application.
Why the IP65 rating and shaft spec matter
IP65 on the housing means the motor body tolerates dust and low-pressure water jets — plant-floor duty where washdown splashes reach the assembly, not submersion or high-pressure cleaning around the cable glands. The D19 x 40 mm shaft with feather key is the standard 1FK2 keyed mounting interface — a direct drop-in against the matching SIMOTICS planetary gearboxes and most third-party couplings sized to that bore, so retrofitting into a line that already uses 1FK2-frame motors generally requires a coupling swap rather than a bracket redesign. Both connectors are M17 — the power side and the DRIVE-CLiQ hybrid plug on the same housing — so cable routing uses Siemens pre-fabricated MOTION-CONNECT leads and the field side doesn't have to guess the pinout.
Lifecycle, ordering class, and what that means for the BOM
Production status is recorded as active, so this part is in current manufacture — not a phase-out, last-time-buy, or NRND situation. The product class flag is the catch: it is built-to-order only and not eligible for return or credit, which is normal for configured servo motors — the M17 connector orientation, encoder type, and shaft detail are all configurable options that get loaded at order entry. Packaged one per box at 452 x 250 x 267 mm, group code R220, product group 9021 — single-piece order unit, the line ships as one configured assembly per order code.