Panel fit and wiring constraints
The quick-assembly mounting system snaps onto the rail without tools. Humidity derating applies above 55 °C: max 95% RH at 55 °C, dropping to 35% at 75 °C.
The 5SY6263-6CC carries a 6 kA breaking capacity per EN 60898 at 400 V AC, and 5 kA per UL 1077 / CSA C22.2 No. 235. That 6 kA rating is the standard for downstream distribution in a typical industrial panel where the upstream transformer or main breaker limits fault current to that level. Energy limiting class 3 means it restricts let-through energy enough to protect downstream wiring and devices in a selective coordination scheme.
The breaker is designed for mechanical engineering and industrial applications per its suitability listing. It carries overvoltage category III, suitable for fixed-installation distribution boards. The functional letter F per DIN EN 61346-2 and DIN EN 81346-2 classifies it as a protective device in the schematic. Touch protection is integrated on the terminals. Compliance documentation (declaration of conformity, CE marking, UL/CSA recognition) is available from the manufacturer's standard documentation set for the SENTRON 5SY6 series.