What this motor is on the bench
The 1FL2304-4AF01-1SB0 is a SIMOTICS S-1FL2 low-inertia servomotor from the 1FL2 family, built to pair one-to-one with the SINAMICS S200 drive platform — the motor side of a 400 V three-axis-class motion axis, sized for the 0.75 kW working point at 3000 rpm with a 3.02 Nm stall and 2.39 Nm rated continuous torque. At 45 mm shaft height, 21-bit single-turn absolute encoder on an angular connector, keyway shaft (tolerance N), and no holding brake, this is the variant you reach for when the holding torque comes from the drive's braking chopper or the load, not from a spring-set brake — the shaft key and N tolerance assume a positive-locking coupling, not a slip-fit pin.
Why IP65 with an oil seal matters on this shaft height
IP65 with oil seal on a 45 mm shaft height means the seal stack at the shaft exit is rated for low-pressure water jets and cutting-fluid splash — close to the machine, away from direct washdown, which is the deployment envelope this 1FL2 variant is engineered for rather than a food-grade hose-down bay. Because the 1FL2304-4AF01-1SB0 ships without a holding brake, the panel builder must verify the SINAMICS S200's vertical-axis handling — a brake-less motor on a suspended load needs either a counterweight, a regen resistor sized for the deceleration duty, or a separate mechanical safety brake outside the motor; the motor itself supplies only the controlled stop.
Compliance and ordering mechanics
The motor has carried RoHS compliance since 2018-01-01 and falls under REACH Art. 33 disclosure duty for any candidate-list substance present above threshold — the REACH information sheet ships with the part and is the document to pull for the declaration pack. It is not dual-use: export control markings read AL:N / ECCN:N, so the part moves under standard commercial export procedures without a license hook in the usual jurisdictions. Siemens lists this code under product class C — built to order, non-returnable, non-creditable. Stocking in multiples beyond the 1-piece quantity unit is a deliberate inventory decision, not a default; pair it to a confirmed S200 drive position before raising the PO line.
Where this code sits in Siemens admin
Internal Siemens coding places the part in Group Code R220 and Product Group X0DM, packaged one per box at 432 × 222 × 240 mm — the same packaging footprint the S200 drive ships in, which simplifies kitting the drive-and-motor pair on the receiving dock.