Digital monitoring relay for cos phi and current monitoring from 90-690 V AC. It offers over- and under-threshold monitoring, is self-powered, and operates with AC 50 to 60 Hz. The peak delay is adjustable from 0.1 to 20 seconds, and the hysteresis is between (I) 0.1 to 2 A. The device features two changeover contacts with or without fault memory and uses spring-loaded technology. The digitally adjustable cos phi monitoring relay SIRIUS 3UG4 monitors the power factor and active current for exceedance, for example, in dirty filter systems, or for under-exceedance, such as in the case of belt breakage or pump dry running. It is suitable for worldwide use thanks to its wide voltage range and international certifications. The relay also monitors smaller single-phase motors with a no-load current below 0.5 A and allows for implicit monitoring of cable breaks and phase loss. The measurement principle of cos phi or active current is selectable. The space requirement in the control cabinet is minimal due to the narrow design. Reliable diagnostics are provided through the display of actual values and status messages. All versions are equipped with removable terminal blocks. In addition to screw connection technology, the devices are also available with spring-loaded connections for a quick, maintenance-free, and vibration-resistant connection. They are optionally available with IO-Link. The comprehensive accessories, such as device labeling plates, insertion tabs, and cover caps, are uniform for all relays. SIRIUS relays - a program for all cases.