What this motor is, and where it lands in a SINAMICS S200 cabinet
The Siemens 1FL2105-4AF01-0MB0 is a SIMOTICS S-1FL2 low-inertia servomotor sized for pairing with the SINAMICS S200 drive family — the catalog description ties the two together as a matched motor/drive set rather than a stand-alone motor. Lifecycle is current per the manufacturer's status field, so the BOM line is supported and there is no EOL pressure to forward-substitute.
Ratings that drive the fit decision
Supply is 400 V 3-phase AC with a rated output of Pn=2 kW at a nominal speed Nn=3000 rpm; continuous torque is Mn=6.6 Nm and stall torque M0=8 Nm — so the motor delivers its rated power at base speed and can pull 8 Nm into the low-speed hold region for short-term overloads during accel/decel. Position feedback is a 21-bit absolute multiturn encoder (AM21bit) in an angular connector, which is what the SINAMICS S200 expects for high-resolution commutation and absolute position retention across power cycles. Mechanical package: 52 mm shaft height, plain shaft with N tolerance, no holding brake. The motor is rated IP65 with an oil seal — sealed against coolant splash and light washdown, but the absence of a brake rules out vertical-axis applications where the load must be held at zero speed with the drive disabled.
Compliance and documentation a buyer should pull with the shipment
RoHS compliance is declared since 01-01-18, and the manufacturer carries the REACH Art. 33 duty-to-inform obligation per the candidate-list process — confirm the latest Reach Information statement at the time of order, since the candidate list updates periodically.
Grouping and product-class notes for internal coding
Siemens lists this motor under Group Code R220 / Product Group X0DK with product class C — manufactured/produced to order, non-returnable — so it is built per order configuration rather than held in shelf stock at the factory. Single-piece quantity unit, shipped in a 432 x 222 x 240 mm pack, which is the single-motor configuration; larger cabinet builds typically purchase multiples of one piece per BOM line.