3RU1146-4DB0
The Siemens SIRIUS 3RU1146-4DB0 thermal overload relay features an S3 frame, Class 10 operating rating, and a current setting range of 18~25 amps. It can be directly mounted on 3RT1044~1046 series contactors, providing phase loss and overload protection, and is suitable for three-phase and single-phase motor circuits.
Product Positioning
The 3RU1146-4DB0 is a Siemens SIRIUS 3RU11 series S3 type frame thermal overload relay with a current setting range of 18~25 amps. It is suitable for use with 3RT1044~1046 contactors to protect medium-sized motor circuits.
Core Product Advantages and Features
S3 type frame contactor paired with
It can be directly assembled with 3RT1044, 3RT1045, and 3RT1046 contactors, making installation simple.
Class 10 Action Level
It provides 10 levels of tripping characteristics under normal startup conditions, balancing protection speed and startup stability.
Phase loss protection mechanism
In case of three-phase current imbalance or phase loss, the trip unit will trip immediately, reducing the risk of motor burnout.
Flexible reset design
Supports both manual and automatic reset modes, allowing for easy adjustment based on production line characteristics.
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3RU1146-4FB0
The Siemens SIRIUS 3RU1146-4FB0 thermal overload relay features an S3 frame, Class 10 operating rating, and a current setting range of 28~40 amps. It can be directly mounted on 3RT1044~1046 series contactors, providing overload and phase loss protection. It is suitable for medium and large three-phase motor circuits.
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3RU1136-4GB0
The Siemens SIRIUS 3RU1136-4GB0 thermal overload relay features an S2 frame, Class 10 operating rating, and a current setting range of 36~45 amps. It is a model with a higher current setting value in the 3RU1136 series and can be installed with 3RT1033~1036 contactors.
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3RU1136-4DB0
The Siemens SIRIUS 3RU1136-4DB0 thermal overload relay features an S2 frame, Class 10 operating class, a current setting range of 18~25 amps, and 1 NO + 1 NC auxiliary contact. It can be directly installed on 3RT1033~1036 series contactors.