The 2TLA010070R0400: With a of current, this part is still being manufactured. No successor or phase-out date on record — it's a standard catalog item you can spec into a BOM without worrying about a last-time-buy window.
This safety relay mounts on DIN rail inside a control panel. The 24 VDC coil voltage is common for safety circuits tied to a PLC or safety controller — no separate power supply needed if your safety bus runs at 24 VDC.