3RB3143-4XW1
The Siemens SIRIUS 3RB3143-4XW1 electronic overload relay has a current setting range of 32 to 115A, is S3 specification, has adjustable trip levels from Class 5E to 30E, can be installed independently, and is suitable for overload protection of large three-phase motors.
Product Positioning
The 3RB3143-4XW1 is an electronic motor overload protection relay from the Siemens SIRIUS 3RB3 series. It belongs to a different product line from solid-state contactors and is specifically designed to detect motor overcurrent and trigger protection actions.
Core Product Advantages and Features
Wide current setting from 32 to 115A
The trip point can be finely adjusted according to the actual rated current of the motor, covering the protection needs of medium and large three-phase motors.
Adjustable jump level from Class 5E to 30E
Select an appropriate trip curve based on the motor's starting characteristics and load conditions to balance protection and starting reliability.
S3 specification independent installation design
It does not require installation in combination with a contactor, and the wiring configuration is more flexible, making it suitable for retrofitting existing panels.
1NC + 1NO auxiliary contact output
It can be directly linked to the control circuit and warning system to provide real-time reports of motor overload status.
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