Siemens 3RB3143-4UW1

This electronic overload relay operates within a current range of 12.5 to 50 A and is specifically configured for motor protection. It is categorized as size S3 and complies with class 5E to 30E. The relay is designed for stand-alone installation and features a main circuit that utilizes a straight-through transformer.

The auxiliary circuit employs screw terminals, and the reset function can be set to either manual or automatic. This device is equipped with an adjustable release class for enhanced functionality and has an external reset capability. Notably, it includes one auxiliary contact as an opener and one as a shutter.

With a power loss of 0.07 watts per pole, the relay effectively manages energy consumption. It is important to note that this relay is not suitable for mounting onto standard rails. The product type is identified as 3RB3, and it originates from the Czech Republic.