5 kW, 2000 rpm, shaft height 90 mm
The 1FL2310-4AC01-0SB0 is a SIMOTICS S-1FL2 low-inertia servomotor out of the 1FL2 family, sized for 400 V 3AC supply with a rated power of 5 kW at 2000 rpm. Continuous torque runs to 23.9 Nm at that speed, with a stall figure of 25.2 Nm — meaningful headroom for cyclic overloads on packaging, indexing tables, and small-format converting axes. The 90 mm shaft height places it in the mid-range of the 1FL2 line, which is the bracket most integrators reach for when a 200 V-class drive would undersize the load but a 290 mm-frame machine is overkill.
Encoder, shaft, brake, and sealing
Feedback is an AS21-bit absolute encoder — multi-turn-capable absolute position out of the box, which removes the home-return sequence from every machine power-up. Shaft is plain, tolerance N (standard fit), and no holding brake is fitted on this build; vertical axes that need a fail-safe park brake have to look at a different option code in the same family. Sealing is IP65 with an oil seal at the shaft pass-through — suitable for plant environments with airborne coolant mist and incidental washdown, not full submerged duty. The connection is an angular connector (option AS21 environment), which keeps the cable exit parallel to the motor face and out of the way of belt-drive or coupling-side hardware.
Paired with SINAMICS S200
The catalog description flags matching drive SINAMICS S200, and that's the combination to plan around: a 5 kW S200 axis block or cabinet drive module handles the commutation, the encoder protocol, and the safety integration over PROFINET. Substituting a third-party drive defeats the purpose of buying into the 1FL2 ecosystem — the encoder and resolver commutation, the one-cable power-plus-feedback hybrid, and the electronic nameplate all depend on the S200 running the motor. At 5 kW with this shaft height and 25 Nm of stall torque, panel-side planning should budget for a 3-phase 400 V feeder on a dedicated circuit breaker, line reactor if the cabinet sits next to a larger drive, and shielded motor cable with the connector keyed to the AS21 angular exit. Cable gland layout on the cabinet base should account for the 495 × 369 × 335 mm shipping carton footprint when sizing the receiving bench or staging rack.
Compliance, packaging, and class-of-trade
The motor is RoHS-compliant since 01-01-18 and is subject to REACH Art. 33 information duties on the current candidate list — the standard Siemens disclosure applies on request. Export-control wise, the part carries AL:N and ECCN:N, so no licence is required for typical cross-border shipment outside sanctioned destinations.
Production status and how to order
For a line-down spare where a 5 kW S200 axis has faulted and the encoder data plate is unreadable, the path of least resistance is to RFQ the 1FL2310-4AC01-0SB0 by its full option string alongside the drive serial so the encoder and connector options can be verified against the original configuration before release.