Siemens AG Monitor - Relay Output 3UG45112BP20

The 3UG4511-2BP20 is a phase sequence monitoring relay designed for AC control voltages between 320 V and 500 V at 50 Hz or 60 Hz, with built-in LED indication and two change-over contacts. It features spring-type terminals accepting conductor cross-sections from 0.25 to 1.5 mm² and is mounted via snap-on rail mounting. The device has an IP20 protection rating, operates between -25 °C and +60 °C, and is certified for overvoltage category III with an insulation voltage of 690 V. It meets IEC 61000-4-4, IEC 61000-4-5, and IEC 61000-4-3 electromagnetic compatibility standards, with contact discharge immunity up to 6 kV and air discharge up to 8 kV. The relay has a mechanical life of 10 million cycles and an electrical endurance of 100,000 switching cycles at AC-15. Galvanic isolation is provided between input, output, and supply circuits. The device detects phase sequence only, with auto-reset functionality.