Overload relay 160...630 A motor protection Size S10/S12 Class 5...30E - 3RB2163-4MC2

Product Description

Siemens SIRIUS Overload Relay 160–630 A, Size S10/S12, Class 5…30E – 3RB2163-4FW2

The Siemens 3RB2163-4FW2 is a SIRIUS electronic overload relay designed for high-current motor protection applications in the range of 160 A to 630 A. It belongs to the 3RB2 series (Size S10/S12) and is used to protect large industrial motors against overload, phase failure, unbalance, and thermal damage.

This relay is widely applied in heavy-duty motor control centers (MCC), compressors, pumps, conveyors, steel plants, and process industries, where reliable and precise motor protection is essential.

Key Features:

• Siemens SIRIUS electronic overload relay 

• Part Number: 3RB2163-4FW2 

• Current setting range: 160 – 630 A 

• Size: S10 / S12 frame 

• Trip class: Class 5 to Class 30 (adjustable) 

• Suitable for contactor mounting or stand-alone installation 

• Main circuit connection: busbar connection system 

• Auxiliary circuit: screw terminal 

• Protection functions: 

o Overload protection 

o Phase failure detection 

o Phase unbalance protection 

o Internal ground fault detection (depending on configuration) 

• Manual / Automatic reset selectable 

• High reliability for heavy industrial motor duty cycles