What the 0.4 kW, 3000 rpm rating commits a buyer to
The 1FL2103-4AF11-1MC0 is a SIMOTICS S-1FL2 low-inertia servomotor sized for 400 V 3AC supply, with a rated power of 0.4 kW at a nominal speed of 3000 rpm and stall/rated torque of 1.27 Nm — the 1:1 M0/Mn ratio signals a constant-torque profile across the operating window rather than a field-weakening range. It carries an AM21-bit singleturn hybrid encoder, a keyed shaft with N tolerance, and a holding brake, with IP65 sealing plus an oil seal at the shaft exit — the oil seal is what allows the motor to live on a gearbox or near a gear-lube splash zone without wicking lubricant past the bearing shield. Because this motor belongs to the 1FL2 family built explicitly for SINAMICS S200 drives, the safe assumption is S200-only pairing — migrating it onto a S210, V90, or older S120 line means the encoder commutation table and the drive parameter set stop lining up, so the servo loop will not close cleanly without a re-commissioning pass.
Ordering posture and what the product class C label actually means
Siemens lists this order code under product class C — a build-to-order configuration that is not returnable for credit and cannot be re-used or re-utilized once the line is cut — so each unit ships against a fresh BOM line with no surplus float on the shelf. Compliance footprint is straightforward: RoHS conformity since 01-01-2018, REACH Article 33 candidate-list reporting via Siemens' Reach Information page, and export classification AL:N / ECCN:N — no licence key required for typical cross-border industrial shipments.
Mechanical envelope and what lands on the receiving bench
Shaft height 30 mm positions this motor at the small-frame end of the 1FL2 family, which is the size class typically driving small-format index tables, lab automation axes, light-duty packaging conveyors, and electronic-component pick-and-place gantries where the 1.27 Nm continuous torque is enough to move the payload without oversizing the cabinet. The shipping carton is 315 × 182 × 172 mm for a single piece — a compact pack that drops onto a receiving bench without a lift, and the AM21-bit hybrid connector lands on the drive end of the cable without needing a separate terminal box on the motor housing.