The SDT21LP is a miniaturised type-1 (top-hat) DIN rail mountable time delay relay made by Salecom. It features adjustable time delays ranging from 0.1 sec to 100 hours, and can be used to control the operation of other devices or events over a period of time. The SDT21LP is ideal for semi-automatically switching on/off motors, pumps, solenoids, and other electrical appliances. It has a 6A rating and 250VAC, 24VAC and 12VDC control supply rating.