!!! product phase-out !!! the preferred successor is 3UG5643-1CS20 digital monitoring relay cos phi and current monitoring from 90 to 690 V AC overshoot and undershoot with internal power supply 50 to 60 Hz AC noise pulses delay 0.1 to 20 s hysteresis for (I) 0.1 to 2 A 2 changeover contacts with or without fault buffer screw terminal - Siemens | JRB