Active SIMOTICS S-1FK2 HD servo with holding brake
The 1FK2104-4AF10-1SB0: It is built as a low-inertia 0.4 kW axis with an integrated holding brake, DRIVE-CLiQ feedback, and an absolute single-turn encoder, which is the standard configuration for tight-dynamics positioning on a SINAMICS S120 drive line.
Ratings and what they mean for axis sizing
Stall torque M0 is 1.27 Nm and rated power PN is 0.4 kW at nN=3000 rpm on a 380-480 V drive bus, so the motor lands in the small-frame SIMOTICS S-1FK2 range suited to high-dynamics axes such as small indexing tables, packaging heads, and feeder drives rather than heavy-payload spindles. On a 200-240 V drive bus the same motor delivers PN=0.2 kW at nN=1500 rpm, which is the so-what of the dual-voltage rating: one part number covers both 400 V-class SINAMICS S120 cabinets and 230 V-class S120 line modules without a re-spec.
Mechanical face, brake, and feedback
The shaft is D19x40 mm with a feather key and the housing is IP64, which is adequate for dry, dust-controlled cabinets but not for washdown — that gap matters when this part is being scoped for any food, beverage, or outdoor enclosure. Feedback is an absolute encoder single-turn 22-bit (AS22DQC) over DRIVE-CLiQ on an M17 plug, and the power lead terminates at an M17 power connector, so the field-replaceable side of the axis is the cable set rather than the feedback device itself.
Lifecycle, compliance, and ERP fields
Group Code R220 and Product Group 9021 are the internal identifiers carried on the line, which is what an ERP record will key on for the BOM entry.