What this motor is and where it drops into a SINAMICS S120 line
The 1FK2104-5AK00-2MB0 is a SIMOTICS S-1FK2 HD servo motor from the 1FK2 family, intended to pair with a SINAMICS S120 drive through its DRIVE-CLiQ M17 interface and a power connector M17. The shaft is cylindrical D14 x 30 mm, the feedback is an absolute encoder AM22DQC at 22-bit singleturn plus 12-bit multiturn — wired straight back to the S120 control module via DRIVE-CLiQ with no separate resolver cable to land. For commissioning, the headline numbers split by bus voltage: PN = 1.07 kW at nN=6000 rpm on a 380-480 V supply, and PN = 0.75 kW at nN=3000 rpm on 200-240 V — the lower-voltage curve is what you actually get on a 230 V line, so the drive sizing math has to follow the bus, not the headline nameplate. Degree of protection is IP64 — sealed against dust and splashing water but not rated for direct washdown, so the motor sits inside the machine envelope, not in a hose-down zone.
Built-to-order footprint and compliance paperwork
Product class is C — built to order, non-returnable, non-reusable. That matters for the BOM: every unit on the order is a fresh build, so spares strategy has to plan for that lead-time shape rather than walking a shelf. Order handling: quantity unit is 1 piece, packaging quantity 1, shipping carton 452.00 x 250.00 x 267.00 mm — a single-motor pack, so multi-axis builds multiply the boxes rather than consolidating. Reference codes carried on the order line: Group Code R220, Product Group 9021 — these are the Siemens-internal handles the buyer uses when raising the RFQ or chasing a partial shipment.