Siemens 5SY7606-7 SENTRON MCB — 4-pole C-curve, dual-rated breaking capacity
It carries dual breaking capacity ratings: 15 kA per IEC/EN 60898-1 and 40 kA per IEC 60947-2 at 400 V AC, plus 15 kA at 60 V DC per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No.235. The neutral pole is switched (3P+N), so you get full isolation on all live conductors. Suitable for mechanical engineering and industry environments. Halogen-free and silicon-free construction. Sealable — useful if you need to lock out settings after commissioning.
Integration — panel fit and thermal derating
The 4-MW width (72 mm) and 70 mm installation depth mean it drops into the same footprint as other SENTRON 4-pole breakers — no re-drilling or gland-plate changes if you're swapping from a different 4-pole MCB in the same family. Temperature derating is specified: max 95% RH at 55 °C, dropping to 55% at 70 °C and 35% at 75 °C. In a sealed panel with multiple breakers side by side, factor in the internal temperature rise — the 75 °C ceiling is the absolute limit, not a continuous rating.
