A protection system for power tools and the installation, preventing excessive inrush current at motor startup. At the moment of starting, the device limits the current surge and prevents overload. Connection: blue (power supply N - neutral) red (power supply L - live) black (output to motor - live) Technical specifications Model: XS-16/Da Rated load: 16(16)A/250V AC or 25(25)A/125V AC 5E4 Dimensions: 52 x 35 x 15 mm