The TA75DU63-20: Listed as current production, so no last-time-buy window or forced migration to a successor part. For a procurement freeze, this relay can be specified into new builds without an obsolescence risk horizon.
The 45-63 A range fits standard IEC motor frames in the 15–30 kW band at 400 V. Mounts directly to ABB A-Line contactors or as a standalone unit on a DIN rail. The thermal bi-metal element tracks motor heating and cooling, so it tolerates moderate inrush without nuisance tripping — useful for pump and compressor starts.