What the voltage range means on the bench
The 1SDA104903R1: The 110-125V AC-DC rating covers both common industrial control voltages — 110VAC from a control transformer and 125VDC from a battery-backed DC bus. That dual-range acceptance saves a relay or converter when the panel has mixed supplies. If you're swapping a failed unit on a machine with a 24VDC control circuit, this won't work — it needs the higher rail.
Sourcing reality
Current lifecycle stage means this is an active catalog number from ABB. No last-time-buy window is scheduled.