Definition: a 1FL2 low-inertia servomotor sized for the SINAMICS S200
The 1FL2306-4AC01-1SB0: The flange carries a single-cable angular connector and a plain shaft with keyway (tolerance N), no holding brake. Protection class is IP65 with an oil seal fitted at the shaft entry, which keeps coolant and cutting-fluid splash out of a typical machine-tool or transfer-line environment. The motor is positioned as part of the 1FL2 servomotor family that is matched one-to-one with the SINAMICS S200 drive platform, so the power connector, encoder protocol and electronic nameplate are designed to plug into a S200 module without parameter-file gymnastics — a fit detail that matters when an integrator is closing out a retrofit and does not want to chase a third-party feedback cable.
What the nameplate codes mean for ordering
The order code breaks down to a 1FL2 shaft-height-65 (frame 06) low-inertia motor with a 21-bit absolute single-turn encoder, plain keyed shaft, no brake, and the standard angular connector variant — each of those options is a fixed position in the Siemens MLFB string, so a buyer swapping the -1SB0 suffix for a brake or different connector is changing a defined feature, not improvising compatibility. The shaft height and the 1.5 kW / 8 Nm rating fall on the same frame used across the family, which is what makes a like-for-like replacement straightforward when a motor is being scrapped for mechanical damage rather than electrical failure.
Compliance and shipping envelope
The motor has been RoHS-compliant since 01-01-18, ships under Reach Art. 33 disclosure obligations, and carries no ECCN / AL export-control flags, which simplifies cross-border shipments for an EU-built machine. It is classed as a built-to-order item — it cannot be returned for credit against the same code — and is supplied one piece per carton with shipping dimensions of 392 x 269 x 286 mm; that carton size is what a panel builder needs to plan the inbound-goods shelf and the unpacking bay height, not the motor itself.