Rated breaking capacity sits at 15 kA per EN 60898-1 and 25 kA per IEC 60947-2; the higher figure governs when the breaker is applied in industrial distribution per 60947-2, giving you headroom for high-fault panels. The 400 V AC rated voltage (440 V maximum across phases) covers standard three-phase line-to-line supplies in most 50/60 Hz installations.
Thermal derating and environmental limits
The manufacturer specifies a relative humidity derating table: 95% RH up to 55 °C, then 55% RH up to 70 °C, then 35% RH up to 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz and 50 m/s² at 25–150 Hz — adequate for most industrial panels unless mounted directly on a reciprocating compressor frame.
Standards and compliance scope
The 5SY7332-8 is certified under IEC / EN 60898-1 (domestic / commercial MCB standard) and IEC / EN 60947-2 plus UL 1077 (industrial circuit-breaker standard). The dual rating means it qualifies for both household-style distribution boards and industrial control panels — the specifier picks the applicable standard for the installation. DC-side rating: 15 kA at 60 V (max 72 V) per IEC 60947-2, useful for DC bus or battery circuits within those voltage limits.