The Siemens 7PU4020-3AB30 is a time delay relay designed for on-delay timing applications, with an adjustable time range from 5 to 100 seconds. It operates on 24 VAC control voltage and features one normally open (NO) and one normally closed (NC) contact, suitable for switching tasks within industrial control panels. This relay is built for DIN rail mounting, making installation straightforward and space-efficient. Distributed by BSP Automation, this model is an updated version of the earlier 3RP1513-1AP30 series, offering reliable timing control in automation systems.