The 50 kA breaking capacity per IEC 60947-2 at 400 V AC tells you this breaker can safely interrupt a fault current up to that level without upstream damage; under UL 1077 and CSA C22.2 No. 235 the rating is 5 kA, so verify the available fault current at the installation point if the panel carries a UL/CSA label. The 1 A rating is temperature-sensitive: at 40 °C ambient it carries 0.93 A, at 50 °C it carries 0.85 A, and at 55 °C it carries 0.8 A — per the datasheet, derate for elevated panel temperatures.
Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz. The product is sealable for tamper-evident applications.