Panel fit and derating
The 1 A rating holds at 30 °C ambient; above that, derate to 0.92 A at 40 °C, 0.88 A at 45 °C, 0.84 A at 50 °C, and 0.79 A at 55 °C. If the panel runs warm — say, a crowded enclosure near a drive cabinet — size the load to the 40 °C or 50 °C column, not the 30 °C number. Mounting position is any, so vertical or horizontal rail orientation doesn't change the rating.
Overvoltage category III, pollution degree 2 — standard for fixed-installation distribution boards. Touch protection is integrated on the terminals.