Headline torque and the two bus-voltage ratings
The Siemens 1FK2104-5AK00-1SB0 is a SIMOTICS S-1FK2 HD servo motor sized for a stall torque M0 of 2.4 Nm, sitting in the low-inertia compact end of the 1FK2 family that plugs into the SINAMICS S120 drive line via DRIVE-CLiQ. On the 380-480 V bus it delivers PN of 1.07 kW at a rated speed nN of 6000 rpm; on the lower 200-240 V bus the same frame drops to PN of 0.75 kW at 3000 rpm — so the drive selection (or the existing line transformer) decides which of the two ratings is the working point, not the motor itself. The shaft is D19x40 with a feather key, the feedback is a 22-bit single-turn absolute encoder (AS22DQC), and both the signal side (DRIVE-CLiQ M17 plug) and the power side (M17 power connector) are M17-coded — meaning the motor cables are keyed to the family, not the user.
IP64 rating and where the motor physically lives
With an IP64 degree of protection, the 1FK2104-5AK00-1SB0 is sealed against dust ingress and splashing water but is not rated for washdown or high-pressure cleaning — it is intended for the inside of a cabinet or a shielded machine zone, not a food-and-bev line or an outdoor pedestal. The DRIVE-CLiQ M17 interface is what auto-negotiates the encoder type, motor parameters and temperature model with the SINAMICS S120 at first connect; the 22-bit single-turn resolution gives 4,194,304 steps per mechanical turn, which is the resolution ceiling for position loops run from this motor without adding an external measuring system.
Lifecycle status, compliance trail, and what 'product class C' means at the RFQ desk
Siemens lists the 1FK2104-5AK00-1SB0 as Active, with RoHS compliance dating from 01-07-06 and REACH Article 33 disclosure obligations carried through the supply chain; export classification is AL:N / ECCN:N_CNDU, so it ships under standard commercial paperwork with no dual-use license gate. Sourcing this part is therefore a confirm-the-spec-and-commit conversation, not a returnable-shelf pickup: the motor is wound, encoder-aligned and shaft-machined for the order, which is also why the packaging is sized for a single piece (452 x 250 x 267 mm) and the quantity unit is 1. The internal Group Code is R220 and Product Group 9021 — the same Siemens classification a parts planner uses to land the right motor when reordering across multiple 1FK2 frame sizes.
Sourcing posture for this build-to-order servo
With product class C and the part confirmed Active, the procurement move is a quoted-to-order ask against the BOM line rather than a spot buy: the motor is configured, wound and serialized for the order, and price is confirmed against quantity and bus-voltage variant at RFQ time — not a stock-holding line item.