At 380/415 V AC it's still 50 kA Icu, which covers most North American 480Y/277 V and European 400 V distribution panels. The breaking capacity code is N (50 kA at 415 V AC), which is the standard rating for this frame size in most commercial panels.
The TM-D trip unit gives you L (thermal) overload protection and I (magnetic) short-circuit protection — no ground-fault module built in. The Ir (overload) setting is fixed at the 50 A rating; the magnetic pickup is factory-set and non-adjustable on this unit. Neutral protection is set at 1 x Ir, meaning the neutral pole tracks the phase protection. That's a 4D configuration — all four poles protected. If you need adjustable magnetic pickup or ground-fault, you'd step up to an electronic Micrologic trip unit on the same NSX frame.
Physical fit — panel and mounting
The breaker measures 161 mm high by 140 mm wide by 86 mm deep. It mounts flat on a backplate — no DIN rail on this one, so plan for a drilled and tapped panel or a subplate. It's IP40 on the front (finger-safe but not water-resistant), so keep it inside an enclosure.
It carries UL 60947-4-1 listing for the US market — the 85 kA Icu at 240 V and 50 kA at 480 V match the IEC figures. IK07 impact resistance per IEC 62262 means it can take a 2 J blow from a hammer or dropped tool without cracking the case.