That kind of SCCR headroom is what you want when the transformer is big and the fault current is ugly.
Ratings that drive the panel fit
Width 105 mm, depth 86 mm, height 181 mm — that footprint matches the standard SENTRON 3VA2 frame. The 160 A rating holds flat from 40 °C to 50 °C, then derates to 154 A at 55 °C and 136 A at 70 °C. If your enclosure runs hot, that derating curve is what you size the breaker against, not the nameplate 160 A.
