3RU1146-4HB0

The SIRIUS 3RU1146-4HB0 is an older generation thermal overload relay of the 3RU1 series. It has an S3 frame size, Class 10 tripping rating, and a current setting range of 36 to 50 amps. It can be connected to compatible 3RT10 series contactors. The original manufacturer has discontinued production of this model. The successor model is 3RU2136-4GB0, which is suitable for purchasing spare parts for existing equipment.

Share To

Siemens SIRIUS 3RU1146-4HB0 Old Generation Thermal Overload Relay S3 36-50A

Product Positioning

The 3RU1146-4HB0 belongs to the Siemens SIRIUS 3RU1 older generation thermal overload relay series. It is an S3 size relay with a current setting range of 36 to 50 amps. It is a different generation product from the current 3RU2 series. The manufacturer has discontinued production of it and recommended the 3RU2136-4GB0 as the replacement model.

Core Product Advantages and Features

36...50A setting range

The trip current can be adjusted between 36 and 50 amps to meet the rated current requirements of medium and large motors.

Class 10 Escape Feature

It conforms to the IEC standard Class 10 thermal runaway curve, reflecting the actual operating temperature rise of the motor.

S3 size contactor mounting

It can be directly mounted under a compatible 3RU1 series S3 size contactor, simplifying panel configuration.

Existing equipment spare parts are preferred

Suitable for the procurement of maintenance spare parts for existing 3RU1 series production lines, or as a transitional option before upgrading to the 3RU2 series.

project	Specification
model	3RU1146-4HB0
Product Series	SIRIUS 3RU1 (Old Generation) Thermal Overload Relay
Current setting range	36...50 A
Frame size	S3
Break away from level	Class 10
Product Status	The original manufacturer has discontinued production; the subsequent model is 3RU2136-4GB0.

Recommend

3RU1900-2AB71

The SIRIUS 3RU1900-2AB71 is an electronic remote control reset module with a rated voltage of 24...30 V AC/DC. It is suitable for 3RU series S00 to S3 size thermal overload relays. When installed on the relay, it can realize the remote reset function, reduce the number of times personnel need to inspect the field panel, and improve the maintenance efficiency of the motor control system.

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.

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.