What it is on the SINAMICS S200 line
The 1FL2103-4AF00-0MC0 is a SIMOTICS S-1FL2 low-inertia servo from the 1FL2 family, designed as the matching motor for a SINAMICS S200 drive — 400 V three-phase supply, 0.4 kW rated power at 3000 rpm, with a standstill torque M0 of 1.27 Nm equal to its rated torque Mn of 1.27 Nm. Mechanical fit is a 30 mm shaft-height frame with a plain shaft, tolerance N, and no holding brake; the 21-bit hybrid connector (AM21bit) carries feedback and power in one plug, which keeps the cabinet-side cable run to a single cordset per axis. Sealing is IP54 without an oil seal — adequate for cabinet-internal or light industrial cabinets, but not the rating to spec for wet zones or food-grade washdown where an IP65 or IP67 servo would be the call.
Headline ratings and the fit decision
The 0.4 kW rating at 3000 rpm with a 1.27 Nm continuous figure points the sizing exercise at small-format point-to-point axes: light indexing tables, small gantries, label and dispenser stations, and the feed axes on compact packaging or assembly cells — anything where the load inertia is comparable to the rotor and the cycle stays under a few hundred ms per move. Matching to the drive is closed-loop by design — the AM21bit absolute encoder gives the SINAMICS S200 the position feedback it needs for servo control without an external battery box on the motor, which simplifies the cabinet wiring on multi-axis machines where DC-bus sharing matters. Mounting and shaft detail are deliberately standard: plain shaft, tolerance N, no holding brake — a brake motor adds length and a different cable harness, so specifying the -0MC0 suffix commits the BOM to a frictionless axis that holds position only while the drive is active.
Lifecycle status and how to source it
Compliance paperwork the buyer usually asks for is on file: RoHS conformity since 01-01-18 and REACH Art. 33 disclosure under the current candidate list — both flow through Siemens' standard documentation pack with the shipment and are reproducible on request.