SIEMENS 3RT1044-1AP00 3RU1146-4JB0

Siemens SIRIUS 3R Motor Starter Combination Description This is a pre-assembled motor starter from the Siemens SIRIUS 3R series, combining a power contactor and a thermal overload relay. It provides a reliable solution for switching and protecting three-phase asynchronous motors. This unit is designed for direct-on-line starting and is suitable for a wide range of industrial applications. Specifications Manufacturer: Siemens Series: SIRIUS 3R Contactor Model: 3RT1044-1AP00 Overload Relay Model: 3RU1146-4JB0 Rated Power (AC-3, 400V): 30 kW Rated Current (AC-3, 400V): 65 A Coil Voltage: 230V AC, 50/60 Hz Overload Current Range: 57-75 A Trip Class: CLASS 10 Size: S3 Mounting: Direct mount / DIN rail Label Info Auxiliary Contact Block: 3RH1921-1DA11 (1 NO + 1 NC) Ui: 1000V Application Ideal for controlling motors in applications such as pumps, fans, compressors, conveyors, and machine tools where robust and reliable overload protection is required. Country of Origin Made in Germany. CO2 Impact By choosing this refurbished component, you are saving approximately 60 kg of CO2 emissions compared to a new purchase. This is equivalent to driving a car for about 300 kilometers. Availability This is an obsolete item but available from our stock. The modern equivalent series is the Siemens SIRIUS 3RT2 and 3RU2. Order now from profideals for expert support and fast delivery. FAQ What is the adjustable current range of the included 3RU1146-4JB0 overload relay?The adjustable setting range for the thermal overload relay is from 57 to 75 Amperes, allowing for precise protection of motors within this full-load current range. Is this motor starter suitable for single-phase motor applications?While it is primarily designed for three-phase motors, it can be wired for single-phase applications. However, the overload protection characteristics are optimized for balanced three-phase loads, and performance may differ. This is an obsolete SIRIUS 3RT1/3RU11 series. Can I use the newer SIRIUS 3RT2/3RU2 accessories with it?No, accessories are generally not cross-compatible between these generations due to changes in physical design and connection points. It is recommended to use accessories specifically designed for the 3RT1/3RU11 series. profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners. Last Update: Friday, March 13, 2026