0.75 kW at 3000 rpm in a 45 mm frame
The Siemens 1FL2304-4AF11-1SB0 is a SIMOTICS S-1FL2 servomotor built to pair with a SINAMICS S200 drive, wound for 400 V three-phase supply with a rated power of 0.75 kW and a rated speed of 3000 rpm, with 3.02 Nm of stall torque available and 2.39 Nm continuous, in a 45 mm shaft-height frame. For the sizing decision: 0.75 kW continuous output at 3000 rpm lands this motor in the small-format positioning servo range — typical duty covers light conveyor indexers, small-format pick-and-place axes, and auxiliary feeds where a 400 V three-phase bus is already in the panel and the SINAMICS S200 is the chosen drive.
Mechanical stack: connector, brake, seal
The motor ships with the angular connector variant for power and feedback, an integrated holding brake for vertical-axis and held-load retention, a keyed shaft with N tolerance, and an oil-sealed IP65 housing — so the unit is sealed for factory-floor splash and dust but not for washdown duty. IP65 with oil seal at this frame means the sealing approach is the cable-connector face plus shaft seal, not a fully potted stator; mating cable assemblies must use the correct Siemens-spec angular connector to preserve the rating through the cable entry.
Lifecycle, class, and compliance trail
Lifecycle is recorded as active in both the product-status field and the lifecycle stage — this is a current-production part on Siemens's books, not a phase-out or last-time-buy position. The product class is C — built to order with no return-for-credit path — so orders are placed against a configured BOM and shipped as manufactured; stocking expectations should be planned around the production-build window, not off-the-shelf shelf-pull.
What it is not, and how to specify it
The 24-bit angular connector feedback variant is the high-resolution absolute encoder option for closed-loop positioning; lower-resolution variants in the same 1FL2 family exist, so the -1SB0 suffix is the deciding string on the encoder choice, not just the brake and seal options.