What the part is on the bench
The Siemens 1FL2104-2AG01-1SC0 is a SIMOTICS S-1FL2 low-inertia servomotor in the 1FL2 family, rated for 200 V 3AC drives and designed as a matched axis for a SINAMICS S200 converter, with a 21-bit hybrid connector encoder on the rear. The headline numbers — 0.75 kW rated power Pn, 3000 rpm rated speed Nn, and 2.4 Nm both at standstill M0 and nominal Mn — sit inside the 1FL2 low-voltage frame family and signal a shaft-height 40 mm machine intended for compact motion axes (conveyor indexing, small-format packaging, light pick-and-place) where the S200 drive handles the closed-loop torque loop. Mechanical build is straightforward: shaft with key, tolerance N, no holding brake, and an IP65 sealing package with an oil seal at the shaft exit — the oil seal is the part that lets the motor sit near gearbox housings where light oil mist is present, while plain IP65 seals would let oil wick past the lip over time.
Fit, ratings, and what they decide on the BOM
200 V 3AC supply with 2.4 Nm continuous torque frames this as the lower-voltage member of the 1FL2 line — pick it when the cabinet transformer feeds a 200 V three-phase bus, not a 400 V bus, because the S200 system the motor is paired with expects the lower-voltage rail and the motor insulation system is rated for it. M0 equals Mn at 2.4 Nm, which tells the buyer there is no torque boost region beyond nominal — duty-cycle planning for short bursts has to come from current and speed headroom on the S200 drive side, not from a peak-versus-continuous torque margin baked into the motor nameplate. The 21-bit hybrid connector encoder (AS-series style) gives roughly 2 million counts per revolution — adequate for the positioning accuracy class of a packaging or light-formatting axis without paying the cost of a 24-bit absolute encoder. Without a holding brake, the motor cannot hold a vertical-axis load at rest under power-off — if the application is a vertical Z-axis or any gravity-loaded slide, the holding function has to come from an external brake or a counterbalance, not from the motor itself.
Lifecycle, compliance, and sourcing reality
Lifecycle status reads Active on the manufacturer record for the 1FL2104-2AG01-1SC0, with no EOL or phase-out notice on file — the BOM line can carry forward with standard sourcing against an RFQ rather than a last-time-buy clock. The part is ordered as a single piece under product class C — manufactured to order, non-returnable, non-reusable credit — so a BOM line should be sized to actual axis count plus spares before the PO is placed; mid-life cancellations are not a credit path.