At 1 A rated current, this is a low-current branch protection for control transformers or lighting contactor coils, not a main feeder.
Mounting position is unrestricted. The IP20 rating applies only with connected conductors — standard for distribution-board internal use, not for exposed outdoor panels without an enclosure. Terminals are sealable, halogen-free and silicon-free construction. Ambient temperature range spans -40 °C to +75 °C, with derated current values above 30 °C (0.96 A at 40 °C, 0.94 A at 45 °C, 0.9 A at 55 °C).