Schneider Electric’s Square D XO-40-XTD1 AC control relay is a Class 8501 timing relay configured with four normally open contacts and a 277 VAC coil. It delivers a fixed one-minute off-delay timing function, so the output remains energized for one minute after the control input is released. This off-delay AC control relay supports timing and sequencing in industrial control circuits, offering a compact 4‑NO timing solution within the 8501XO40XTD1 family.
