Where the 1FL2 fits in a SINAMICS S200 cell
The 1FL2103-4AF01-1SC0 is a SIMOTICS S-1FL2 low-inertia servomotor in the 1FL2 product family, sized to pair with a SINAMICS S200 drive — the motor carries the matching electronics interface and ships with the encoder, brake option, and shaft key already specified on the order code, so the drive-side commissioning profile is set by the motor variant, not assembled in the panel. At a 30 mm shaft height with 1.27 Nm continuous and peak torque, 0.4 kW rated power at 3000 rpm, and a 400 V 3AC supply, this is the small-frame end of the S-1FL2 line — typical fit is light positioning axes (conveyor diverters, small indexing tables, lab automation, packaging feeders) where the load inertia is closer to the rotor than to a gearbox and the cycle time is the binding constraint, not the absolute torque.
Reading the headline ratings
Supply voltage 400 V 3AC and Pn 0.4 kW set the upstream protection and cable sizing — a 400 V three-phase feed with the motor drawing well under 1 A continuous means the branch breaker and the VFD input contactor are sized for inrush, not running current. Rated speed Nn 3000 rpm with M0 equal to Mn at 1.27 Nm tells you the motor is built for constant-torque duty across its speed range rather than a high peak-to-continuous ratio; the application is steady positioning torque, not pulse-loaded punch. The AS21bit hybrid connector carries both power and the absolute encoder signal in one cable — single-cable feedback cuts the cabinet-side wiring and the EMC surface area, which matters at 21-bit resolution where any common-mode noise on a separate feedback line shows up as a cyclic following error. Without a holding brake (the order code does not include the brake option), the axis needs a mechanical brake or a counter-load if the application must hold position with the drive disabled. IP65 with oil seal means the shaft seal is rated for oil-mist environments, not just water splash — fit for machine-tool adjacent cells, food-packaging conveyors with lubricant exposure, and anywhere washdown or cutting-fluid mist reaches the motor face. The shaft-key with Tolerance N gives a positive drive to a coupling or pinion without a slip-fit; backlash in the train is in the mechanical coupling, not the shaft interface.
Lifecycle, compliance, and what arrives in the box
Group Code R220 and Product Group X0DJ are the internal classification keys used on the order acknowledgement and packing list; they do not change the motor specification but are what the Siemens price list and shipping documents use to route the line. No UL, CSA, or CE mark is listed in the part record itself; the conformity assessment for the assembled machine is the panel builder's responsibility, and the motor-side approvals live on the SINAMICS S200 drive documentation, not on this motor order code. Product class C: made-to-order, non-returnable, single-piece quantity unit. Packaging is a single motor per box at 315 x 182 x 172 mm — consistent with the 30 mm shaft-height frame and a cable tail bagged alongside the connector. Lead time and pricing are confirmed against the RFQ because each unit is built to the encoded variant rather than pulled from a stocked SKU.