Discontinued since 01.10.2019 — what's left in the channel
The 1FK7032-5AK71-1SB3 is listed as discontinued by Siemens effective 01.10.2019, with the lifecycle stage recorded as eol_hot — meaning the part is past its production window but still in active service in installed fleets (cites:,).
What the motor is and where it sits in a SINAMICS line-up
The 1FK7032-5AK71-1SB3 is a compact synchronous servo motor in the Siemens 1FK7 family, the low-inertia brushless range typically paired with SINAMICS S110/S120 drive controllers on positioning axes, feed drives, and small-format machine tool spindles (cites:,). The -1SB3 shaft-side code points to a plain shaft without brake in the standard encoder configuration; the motor carries the Siemens incremental encoder resolver option typically used for absolute position feedback to the drive (cites:).
Mechanical envelope and panel-side handling
Mounting is the standard Siemens 1FK7 flange footprint with the drive-end cable entry for the power and signal cores routed to the SINAMICS terminal box; commissioning engineers should follow the Siemens EMC and grounding guidance in the 1FK7 documentation set when integrating into a SINAMICS line-up (cites:).