What this motor is
The 1FK2204-6AF11-1MB0 is a SIMOTICS S-1FK2 CT synchronous servo from the 1FK2 servomotor family for SINAMICS S120 drives, rated M0 = 3.2 Nm with PN = 1 kW at nN = 3000 rpm on a 380-480 V bus and PN = 0.5 kW at nN = 1500 rpm on 200-240 V. The unit ships with a holding brake, an IP65 housing, a D19 x 40 mm keyed shaft, an AM22DQC 22-bit + 12-bit multiturn absolute encoder, and both DRIVE-CLiQ and power connectors in M17 form factor.
Where the 1FK2 CT fits on the machine
Rated 1 kW at 3000 rpm with a 3.2 Nm stall torque, this frame targets mid-range positioning axes — packaging indexing, labelling heads, small feeders, and rotary tables where a holding brake is required for vertical or gravity-loaded holds. IP65 sealing on the housing and shaft seal lets the motor live close to the process without an additional cover; the DRIVE-CLiQ M17 plug carries the encoder link straight back to a SINAMICS S120 drive module without a separate SMC/SME box. The D19 x 40 mm feather-key shaft is a standard SIMOTICS coupling interface — pairing with a servo gearbox or a pinion follows the standard 1FK2 shaft loading envelope, not a custom adapter. The holding brake is sized for the motor's static holding torque, not for cyclic dynamic braking; cyclic stop duty must respect the brake's rated cycle count per the SINAMICS S120 application notes.
Procurement class and BOM implications
Siemens classifies the 1FK2204-6AF11-1MB0 under product class C: produced to order and not returnable for credit. For a panel builder this means the order code, encoder option, brake option, and connector style must be frozen at RFQ — a wrong digit on the -1MB0 suffix cannot be reworked and credit is not issued. Quoted to order against the BOM line; availability and pricing confirmed at quote time.
Compliance and traceability
Group code R220 / product group 9021 are the internal Siemens classification keys the OEM purchasing agent needs to map the line to the correct order desk and quote channel.