What this motor is and what it pairs with
The Siemens 1FL2104-4AF11-1HC0 sits in the SIMOTICS S-1FL2 low-inertia family, rated 1 kW at a nominal 3000 rpm with a continuous stall torque of 3.2 Nm that equals its rated torque, so the motor can hold full torque at standstill without a gearbox derate. It is built as the matched servomotor for the SINAMICS S200 drive platform — the cable, encoder protocol and braking resistor sizing all assume that pairing. Supply is 400 V three-phase AC, the unit carries an AS17bit hybrid connector for power and feedback in one plug, ships with a holding brake, a keyed shaft in tolerance N, and IP65 protection with an oil seal on the shaft exit — so the motor is specced for cabinet-edge mounting near the machine, not inside a sealed enclosure.
Ratings in plain terms for the BOM line
The 3.2 Nm continuous torque at 3000 rpm is what converts to the 1 kW shaft output — pick this frame when the load needs roughly that torque continuously and the machine cycle lets the motor run near rated speed most of the time. Dropping below ~1500 rpm for long dwells means the holding brake does the parking work, not the motor; that is normal for this class but worth confirming against the duty cycle. Shaft height 40 mm places the 1FL2 at the small-frame end of the S200 lineup, suited to packaging, light-conveyor and small pick-and-place axes where a higher-inertia alternative would over-size the drive and the cabinet footprint. The keyed shaft in tolerance N is the standard press-fit option for pinions and couplings; a smooth shaft variant exists in the family if the assembly needs it.
Siemens lists the 1FL2104-4AF11-1HC0 as active in the current lifecycle stage, so the part is still being built to order rather than warehoused as a stock item. Because the product class is C — produced to order, non-returnable and non-reusable — the BOM line needs a committed quantity and a delivery window before the factory cuts the shaft. Compliance posture on file: RoHS conformity since 01-01-18, REACH Article 33 disclosure obligations apply, and the export classification is ECCN N / AL N, which keeps cross-border paperwork to a standard commercial invoice in most jurisdictions.
Ordering posture
Because the unit is built-to-order under class C, independent distribution quotes against the requested quantity and the SINAMICS S200 drive it is being paired with — cable lengths, connector orientation and brake voltage are confirmed at RFQ so the motor arrives ready to drop on the axis. Group code R220 and product group X0DK are the Siemens ordering references that need to match on the purchase order line.