Stainless servo motor
Siemens SIMOTICS S-1FS2
Hygienic stainless-steel servo motor for food, beverage and pharmaceutical washdown areas, running only on the SINAMICS S210 drive.
Key specifications
| Ingress protection | IP66/IP67 whole motor; IP69K (30 bar) motor housing |
|---|---|
| Rated torque | 3.1–14 Nm |
| Power | 450–1,900 W |
| Frame sizes | 40, 52, 63, 80 mm |
| Supply | 1 AC 200-240 V (0.8 kW, 3.1 Nm); 3 AC 200-240 V (0.45-1.7 kW, 3.1-14 Nm); 3 AC 380-480 V (0.8-1.9 kW, 3.1-14 Nm) |
| Feedback | 22-bit multi-turn absolute (AM22DQC) |
| Housing | stainless steel 1.4404, EPDM seals, NSF H1 grease |
Summarised in our own words from Siemens AG's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2 · Source 3
Notes on this data
Torque/power from current S210 page. 2022 SIMOTICS brochure quotes a wider 3-23 Nm standstill torque and 0.8-2.5 kW, possibly including shaft height 80 - conflict flagged. Not compatible with SINAMICS S120 per 2021 product announcement.
Specify Motion is not affiliated with Siemens AG. Siemens and SIMOTICS S-1FS2 are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with a Siemens part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These 3 series from our supply network are the closest match on published figures.
Kinco's current-generation AC servo motor line, matched to the JD2 and FD5P PRO drives. Small-inertia 40-80 mm frames run at 3000 rpm on 220 V; large-inertia 130 and 180 mm frames are 1500 rpm machines reaching 47.8 Nm rated and 7.5 kW, with 23-bit multi-turn absolute encoders as standard.
| Published maximum | SIMOTICS S-1FS2 | SMK Series AC Servo Motors (SMK40S/60S… |
|---|---|---|
| Rated torque | 14 Nm | 47.8 Nm meets or exceeds |
| Peak torque | — | 119.5 Nm |
| Speed | — | 6,000 rpm |
| Power | 1,900 W | 7,500 W meets or exceeds |
Kinco's established AC servo motor range from 40 to 180 mm frames, covering 50 W to 7.5 kW and up to 48 Nm rated torque. Standard feedback is a 2500-line incremental encoder with Hall commutation, with absolute options and a resolver on the 180 mm frame. Pairs with FD2S and CD2S drives.
| Published maximum | SIMOTICS S-1FS2 | SMH Series AC Servo Motors (SMH40S-SMH… |
|---|---|---|
| Rated torque | 14 Nm | 48 Nm meets or exceeds |
| Power | 1,900 W | 7,500 W meets or exceeds |
Compact Kinco AC servo motors from 50 W to 3 kW with absolute encoders (17-bit single-turn or 16-bit multi-turn), in 40-130 mm frames for use with FD2S and CD2S drives.
| Published maximum | SIMOTICS S-1FS2 | SMC Series AC Servo Motors (SMC40S/60S… |
|---|---|---|
| Rated torque | 14 Nm | 14.3 Nm meets or exceeds |
| Power | 1,900 W | 3,000 W meets or exceeds |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Other stainless servo motor series
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