

ST/SN Series AC Synchronous Motors
ST and SN Series synchronous motors provide high performance in three frame sizes, NEMA 23, 34 and 42 (60, 90 and 110 mm). Resistor-capacitor kits are also available. These motors are driven economically from standard AC line voltage and the synchronous speed is related to the line frequency.

Features
- ST models: NEMA 23 (60 mm), three stack length options with torque ratings to 131 N-cm (185 oz-in)
- SN3 models: NEMA 34 (90 mm), three stack lengths with torque ratings from 198 to 636 N-cm (280 to 900 oz-in)
- SN4 models: NEMA 42 (110 mm), three stack lengths with torque ratings from 500 to 1059 N-cm (715 to 1500 oz-in)
- All models offer flying lead, terminal box, connector and shaft extension options
- 72 rpm motor speed (with 60 Hz voltage)
- Constant speed does not vary with load
- 120 volt AC models
- Fast starting, stopping and reversing
- Can be stalled indefinitely without overheating
- Standard connections include leaded, terminal box, MS connectors, rear shaft
Media & Downloads
Title | Language | Date | Share URL |
---|---|---|---|
Kollmorgen Catalogo Automazione e Motion Control IT | Italian | Share URLview | |
Kollmorgen Automation and Motion Control | English | Share URLview | |
Kollmorgen otomasyon ve hareket kontrol çözümleri kataloğu TR | Turkish | Share URLview | |
Stepper and Synchronous Motors Catalog EN Rev C | English | Share URLview | |
科尔摩根运动控制及伺服系统解决方案 | Chinese, Simplified | Share URLview |
These 3D models are intended to guide your design activities and may be used as reference information. Be sure to consult a Kollmorgen expert to ensure you have the most current and accurate information for critical aspects of design work.
Title | File Language | Date | Share URL |
---|---|---|---|
Superior Stepper Connection Diagrams EN.pdf | English | |
Share URL /sites/default/files/public_downloads/Superior-Stepper-Connection-Diagrams_en-US.pdf |
Superior Synchronous Connection Diagrams en US.pdf | English | |
Share URL /sites/default/files/public_downloads/Superior-Synchronous-Connection-Diagrams_en_US.pdf |
Title | File Language | Date | Share URL |
---|---|---|---|
Blue Guide | English, German | |
Share URL https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=OJ%3AC%3A2022%3A247%3ATOC |
Kollmorgen EU Declaration of Conformity PowerPac K-N-SN | English | |
Share URL /sites/default/files/public_downloads/Kollmorgen%20EU%20Declaration%20of%20Conformity%20PowerPac%20K-N-SN.pdf |
Support
Trade Compliance | ![]() |
February 21, 2023 |
Normen und Richtlinien | ![]() |
May 10, 2017 |
Standards and Directives | ![]() |
August 21, 2014 |

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