UL 1077 listing (5 kA) covers North American supplementary protection applications, so this one breaker spans both IEC and UL jurisdictions.
Fit and footprint — DIN rail, modular width, terminal detail
Combined terminal at both top and bottom means you can bus-bar the line side without extra links. Mounting position is any, so vertical or horizontal rail orientation works. IP20 with conductors connected — standard for inside a cabinet, not for washdown.
Environmental tolerance — built for the panel, not the pit
Humidity derating curve is published: 95 % RH up to 55 °C, 55 % RH at 70 °C, 35 % RH at 75 °C — so in a high-humidity environment, keep the ambient below 55 °C to avoid nuisance trips.