Rated breaking capacity hits 15 kA per EN 60898 and 50 kA per IEC 60947-2 at 400 V AC — that 50 kA figure is the industrial-grade rating you need for high-fault panels where the upstream transformer can dump serious current. The 5 kA per UL 1077 / CSA C22.2 No. 235 covers North American supplemental protection applications. For DC circuits, it interrupts up to 15 kA at 72 V (IEC 60947-2) or 5 kA at 125 V (UL 1077). The 50 kA SCCR gives you headroom for coordination studies without cascading upstream.
Environmental and installation
Ambient temperature range spans -40 to +70 °C, so it's fine for unheated enclosures or near hot machinery. Storage range extends to -40 to +75 °C.