What you're actually sourcing
The 1FL2103-4AF10-1SC0 is a SIMOTICS S-1FL2 low-inertia servo motor in the 1FL2 family, sized for the SINAMICS S200 drive platform — 400 V 3AC supply, 0.4 kW rated power, rated and stall torque both 1.27 Nm, 3000 rpm rated speed, in a 30 mm shaft-height frame (cites:,). The single torque figure matters: M0 = Mn = 1.27 Nm means stall torque equals rated torque, so this frame does not gain extra pull-up torque beyond its continuous rating — it is the right call for cyclic point-to-point moves rather than presses or heavy-load starts (cites:).
Mechanical and electrical fit
Encoder is the AS21bit absolute single-turn via the hybrid connector; the shaft carries a key per DIN 6885-style tolerance N, and an integral holding brake holds the axis at standstill — so the cable set you pull must be the S200 hybrid-cable variant, not the resolver cable from older 1FK/1FT motors (cites:). IP54 with no oil seal is the configuration here; the seal is omitted, so the motor is not specified for splash zones with cutting fluid or coolant — the absence of the seal is part of the order code, not a cost-out (cites:). Packaging is a single-piece shipper at 315 × 182 × 172 mm, supplied as one unit per order quantity (cites:,).
Lifecycle and the BOM line
RoHS since 01-01-18 and REACH Article 33 disclosure on the dossier: substantive compliance; no UL/IEC marks appear in this spec row, so confirm the agency list against the SINAMICS S200 system documentation before specifying into a UL 508A panel (cites:,). Group code R220 / product group X0DJ on the Siemens ordering line — these are the administrative keys to keep on the PO so the quote returns the right build (cites:,).