Rated 8 A at 35 °C ambient, the breaker's thermal element is calibrated to that reference. At 40 °C the continuous rating drops to 7.35 A; at 50 °C it's 6.63 A; at 60 °C it's 5.83 A. If the panel ambient runs warm — common in a sealed railway enclosure — size the load against the derated value at the actual temperature, not the 35 °C headline.
The breaker carries a pollution degree 3 rating and overvoltage category III, meaning it's suitable for fixed installations inside building distribution panels or industrial switchgear where transient overvoltages are controlled by upstream SPDs. The product designation per IEC 81346-2 and DIN EN 61346-2 is F — the standard functional code for protective devices. Compliance documentation typically includes CE declaration, RoHS and REACH statements, and the IEC 60898 test certificate. For railway-specific projects, the manufacturer can supply the vibration test report per IEC 60068-2-6 and the temperature-humidity profile per the operating conditions (max 95% RH to 55 °C, derating to 35% RH at 75 °C).