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3RM1 Motor Starters

3RM1 Motor Starters

SIRIUS 3RM1 motor starters


Does every millimeter count in your control cabinet? The solution: Motor switching and protection in a width of only 22.5 mm. Depending on its assembly, the motor feeder thus requires up to 75% less space in the control cabinet, making it even more efficient. This facilitates space savings compared to conventionally wired motor feeders. Furthermore, this eases the development of compact and modern systems and machines. SIRIUS 3RM1 motor starters are available as direct-on-line and reversing starters. They are suitable for the switching of small motors up to 3 kW.


Numerous innovations ease the new SIRIUS 3RM1 motor starters' handling. The resulting time savings enable you to focus on your core business. The integrated overload protection represents one of the highlights of these motor starters. This function ensures motor protection coupled with increased system availability. SIRIUS 3RM1 motor starters - for the easy and rapid realization of sustainable systems.

Mounting is ever so easy: All functions are combined in one motor starter, doing away with the need for various devices such as contactors and overload relays. This results in reduced storage and commissioning costs. Furthermore, the motor starters feature the durable and energy-saving hybrid switching technology.

All motor starters are certified in accordance with IEC, CCC and UL. They are thus suitable for the international market as no country-specific versions are required. This minimizes ordering and storage costs and additionally eases the import and export business.


A special infeed system is available for SIRIUS 3RM1 motor starters. This ensures significantly eased main circuit wiring thanks to minimized wiring expenditures and time. Also maintenance works are considerably eased.

Moreover, connection is eased by the optional availability of screw-type and spring-loaded connection system


SIRIUS 3RM1 motor starters win iF product design award. An international panel of 49 judges was impressed by the design. The enclosure concept combines enhanced functionality with a slim design. It is also standard for all devices.

The enclosure concept scores with:

  • Needle-sharp laser labeling

  • removable terminals and hinged covers

  • The winning enclosure is also used for several systems. Not only motor starters but also safety relays are housed in the same enclosure.

  •  More information about SIRIUS 3SK1 safety relays

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