The Siemens 3UG5532-1AW30 is an analog voltage monitoring relay that tracks both overshoot and undershoot across a 10 to 690 V AC/DC range. It's powered from a separate supply of 24 to 240 V AC/DC, 50/60 Hz, and offers an adjustable trip delay from 0.5 to 30 seconds. Output is a single changeover contact via screw terminals. This is a current-production part, so it's a straightforward BOM line item — no last-time-buy or obsolescence tracking needed.
The 10-690 V AC/DC sensing range covers most common industrial control voltages — 24 VDC, 120 VAC, 230 VAC, 400 VAC, and 690 VAC — without needing a separate potential transformer. The separate supply voltage (24-240 V AC/DC) means the relay can be powered from a different circuit than the monitored line, which is useful when monitoring a motor feeder from a control panel supply. The 0.5-30 s trip delay lets you ride through momentary sags or surges that would otherwise nuisance-trip a fast-acting relay; set it short for sensitive electronics, longer for motor starts that pull the line down briefly.
This relay belongs to the voltage monitoring family (Product Family: Voltage monitoring). Typical deployment is in control panels monitoring three-phase or single-phase supplies for undervoltage or overvoltage conditions that could damage downstream drives, PLCs, or contactors. The adjustable delay makes it suitable for pump panels, conveyor lines, or HVAC equipment where temporary voltage dips are expected during startup.